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PROJECT WINTERHAVEN
A PROPOSAL FOR ~INT SERVICES RESEARCR AND DEVELOPMENT CONTRACT
THE TOWNSEND BROWN FOUNDATION 416 Bowen Building Washington 5, D. C.

,,
THE TOWNSEND BROWN FOUNDATION
(Non-profit corporation, Ohio-193$)
PURPOSES:
10 To engage, in general, in philanthropic enterprise and in the furtherance of the humanities - science, art and literature.
To assist worthy charitable and relief organizations, educational and religions institutions.
30 For the general advancement of science, art
and literature, the promotion of scientific research, the development of art, artistic crafts, sculpture, music; musical appreciation, dramatics, the ballet; for the study and dissemination of history, philosophy and languages.
The construction and maintenance of laboratory and/or other bUildings and equipment, the employment of suitable personnel, the financing of scientific expeditions, technical investigations and the likeo
50 The granting of awards, scholarships and
endowments for meritorious effort or achievement in science, art and literatureo
60 The dissemination of knowledge in science, art and literatureo
7D The doing of such acts as may be incident
thereto and in furtherance of the foregoing.

BROWN j Thomas Townsend, physicist, biophysicist; born Zanesville, Ohio March 1$, 1905. The Hill School, Pottstown, Pao, Doane Academy, Granville, Ohio, California Institute of Technology, Pasadena, Califo p Kenyon College, Gambier, Ohio, Denison Universityj Granville j Ohioo Special electronics research j Denison University, 1924-19250 Private research laboratory, Zanesville, Ohio, 1926-19300 Naval Research Laboratory, Washington, Do Co 19301933. Staff physicist, International Gravity Expedition to the West Indies 1932, Physicist, Johnson Smithsonian Deep Sea Expedition 1933 j Bureau of Ships, Navy Department, Officer-in-charge of Acoustic and Magnetic Mine sweeping , 1940-41, Officer-in-charge, Atlantic Fleet Radar Materiel School, and Atlantic Fleet Gyrocompass School, Norfolk, Va o, Materials and Processes Engineer, Glenn Lo Martin Aircraft Coo Baltimore, Mdo, Radar Consultant, Lockheed Aircraft Coo Burbank, Calif OJ Consulting physicist, Pearl Harbor Navy Yard. Private research (biophysics) on radiation and plant growtho Isla~d of Kauai, Hawaii, The Townsend Brown Foundation Pacific Expedition j 194$-1951.
Member of:
American Physical Society (American Institute of Physics) since 1926.
American Association for the Advancement of Science. (Fellow)
American Geophysical Union of the National Academy of Science, (National Research Council) Washington, D.C.
American Society of Naval Engineerso Astronomical Society of the Pacifico
Patents granted:
No. 300,311 (British) Method and Apparatus for Producing Force or MotioD e
No. 1,974,4$3 (U.S.) Electrostatic Motor. No. 2,417,347 (U.S.) Vibration Damper, assigned to
Lockheed Aircraft Corpe No. 2,207,576 (U.S.) Electric Precipitation Method. No. (classified) (U.S.) Buoyant Cable, assigned to
U. S. Navy.

TABLE OF CONTENTS

Purposes.

Page 1

Organization..

1.1

Proposed Organization Chart.

1.2

Historical Background.

2

Research on the Control of Gravitation. Results of Research to date:

§

Electrified disc airfoils.

9

Electrogravitational communication system.

10

Definitive Experiments:

12

Group A Field relationships.

12

Group B Wave propagation.

14

Group C Ponderomotive forces in solid dielectrics. 16

Group D Reactivp forces in fluid dielectrics.

19

Immediate uses if experiments prove to be positive; 21

Propulsion.

2l

Communications.

23

Detection of distant atomic explosions.

25

General Objectives.

26

APPENDIX

Outline of Program of Fundamental Research.

28

Section A The Franklin Institute of the State of

Pennsylvania.

A1

Contents.

A1

Introduction.

A2

I. Library project.

A3

II. Trouton-Noble experiment.

A4

III. Low-temperature research with liquid

helium cryostat.

A7

A. Mass of electron in metals:

A7

B. Electromagnetic equations for

super-conducting state.

All

C. Creation of low-temperature lab.

A13

IV. Solid state phenomena.

A15

A. Dielectric measurements.

A16

1. Electronic polarizability.

A17

2. Ionic polarizability.

A17

3. Polarization due to alignment of

molecules.

Al7

B. Other problems.

A20

1. Phosphors.

A20

C. Piezoelectric and allied phenomena. A21

D. Other work with crystals.

A22

V. RelationShips between electrodynamics and

gravitation.

A24

Conclusions.

A26

:~e Townsend Brown Foundation, Purposes of Incorporation. :~c~s Townsend Brown, Diographical sketch.

PROJECT WINTERHAVEN
PURPOSES:
For the last several years, accumulating evidence along both theoretical and experimental lines has tended to confirm the suspicion that a fundamental interlocking relationship exists between the electrodynamic field and the gravitational field,
It is the purpose of Project WINTERHAVEN to compile and study this evidence and to perform certain critical or definitive experiments which will serve to confirm or deny the relationshipo If the results confirm the evidence~ it is the further purpose of Project WINTERHAVEN to examine the physical nature of the basic T1electro-gravitic couplet! and to foresee and develop possible long-range practical
applications <>
The proposed experiments are to be limited at first to force measurements and wave propagation., They are to be expanded, depending upon results j to include applications in propulsion or motive power, communications and remote control, with emphasis on military applications of recognized priorityo
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ORGANIZATION:
It is proposed that the organization of Project WINTERHAVEN be formed by four commercial corporations engaged in applied research and four academic institutions engaged in pure research. In a program of this unusual scope and intrinsic importance, it is considered to be necessary from the start to establish a careful balance between pure and applied research and the mental qualities and attitudes found in each. It is further suggested that the attention of one-half of the organization be directed toward applications to propulsion and the other half toward applications to communicatioo& Companies are to be selected whose current interests lie in these specific fields and whose personnel, combined facilities and hearty support can make the most effective contribution.
It is proposed that a prime contractor be elected, a company not necessarily a participant in the actual research effort, which is experienced in the administration of government contracts and which will be recognized and approved by the Department of Defense in a proprietary award. Funds obtainable under the prime contract are then to be distributed to the eight cooperating organizations under appropriate sub-contracts.
- 1.1 -

PROJECT "WINTERHAVEN"
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ISSUE I: OCTOBER 20, 19152 ISSUE 2: JANUARY I, 19!'13

HISTORICAL BACKGROUrID:
The story of the falling apple, which led to Sir Isaac
Newton's law of gravitation, is familiar to ,nearly everyone.
It is the usual starting point in any resume about gravitation. Newton's law was the first mathematical expression of a strange and mysterious force - a force which has continued to remain a mystery for over two hundred years.
During this period, few scientists have emerged to offer a solution - so great, as a matter of fact, has been the enigma. In the dusty unpublished notes of Sir Oliver Heaviside, written in the latter part of the nineteenth century, a remarkably adequate theory of gravitation was proposed. It was the first theory, so far as is known, to link the electrodynamic field to the gravitational field.
In 1905, Einstein pUblished the Special Theory of Relativity and this was soon followed by the General Theory, describing gravitation in quite different terms but again implying a similarity and possible relationship with the electrodynamic field. SUbsequently, in the Unified Field Theories, Einstein has attempted to work out the mathematical basis for such a correlation, but so far has been unable to offer any specific experiment or observation (as in the case :: Relativity) by which such a suspected relationship can be
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Compelled by a deep interest in the subject, Townsend Brown (as an IS-year old student at the California Institute of Technology and later at Denison University) performed crude but apparently significant experiments with electric capacitors, using plates and dielectrics of various Masso The impetus for such an investigation was provided by the academic controversy which Relativity aroused in the early twentieso Brown developed the thesis that, due to the similar or equivalent nature of the electric and gravitational fields, a reciprocal influence could be expected which, if constrained, would give rise to physical forces detectable under certain circumstanceso
These early studies and the experimental results were called to the attention of Dr o Paul Alfred Biefeld (a colleague of Albert Einstein in Germany. See appendix "WhoVs Who"), then professor of astronomy at Denison University and director of Swazey Observatory. Dr. Biefeld continued his interest and active support of the experiments for many years and, prior to his untimely death in 1936, subscribed by affidavit that the observed effects in his opinion did represent "an influence of the electrostatic field upon the gravitational field". This strange new effect, first indicated by the results of these experiments with electric capacitors, has since been named the Biefeld-Brown effect; but due to the incompleted experiments and inconclusive results, publication has been withheldo In recent years, as additional data of a confirming nature became available, the research has been associated with government research projects of a highly classified status, and publication has been precluded o
- 3-

Townsend Brown continued to conduct studies of this basic effect with particular attention to increasing the ponderomotive forces revealed in massive dielectric materialsj especially, as it became apparent j in those materials with high specific inductive capacity or dielectric constant (K)o Various obstacles were met and were only partly overcome o There remained the problem of supplying the required high potentials and developing suitable dielectric materials capable of withstanding such potentials,
Due largely to the limitation of the dielectric constant (K) of materials available in those days, the forces obtained in the early stages of the research were never very largeo Hence the effect remained for many years in the category of a nscientific curiosity"o It appeared impossible to increase the "K" to a value sufficient to produce consistently measurable or mechanically useful forceso
Within the last few years j however j due to the demands of radar and television instrumentationj new dielectric materials have been developedo The available values of K have progressively increased from 6 to 100, from 6,000 to 30,000 and beyondo Dielectrics with K of 6,000 are now available commercially, increasing by a factor of one thousand the magnitude of the ponderomotive forces theoretically obtainable, This should be sufficient, if the theory holds,
- 4-

to produce mechanical forces large enough to be accurately measured and also to be usefulo In short, it now appears that materials are available at last which are necessary to conduct experiments which will be conclusive in proving or disproving the hypothesis that "a gravitational field can be effectively controlled by manipulating the spaceenergy relationships of the ambient electrostatic field".
RESEARCH ON THE CONTROL OF GRAVITATION:
In further confirmation of the existing hypothesis, experimental demonstrations actually completed in July 1950, together with subsequent confirmations with improved materials, tend to indicate that a new motive force, useful as a prime mover, has in reality been discovered. While the first experiments with new dielectric materials of higher K indicated the presence of a noteworthy foree, the tests were mainly qualitative and imperfect because of other factors, and the ultimate potential in terms of thrust still remains highly theoreticalo The behavior of the new motive force nevertheless does appear to be in agreement with the hypothesis that there is an interaction between the electrical field and the gravitational field and that this interaction may be electrically controlled.
Discovery of what may turn out to be the long-sought "electro=gravitic couple" should lead to the development of an entirely new form of prime mover, a form of electric motor
- 5-

utilizing electrical and gravitational fields in combination rather than electric and magnetic fields (as in all other forms of motors in use at the present time)o It is interesting to note that virtually all of the electric industry today is based on the electro-magnetic inter-relationship in one form or another, dating back to the historic research of Faraday and Maxwello These original formulations have been changed but little during the growth and development of the electrical age"
It is believed by the sponsors of Project WINTERHAVEN that the technical development of the electrogravitic reaction would usher in a new age of speed and power and of revolutionary new methods of transportation and communication" Theoretical considerations would predict that 1 because of the privilege of sustained acceleration, top limits of speed may be raised far beyond those of jet propulsion or rocket drive~ with possibilities eventually of approaching the speed of light in "free space"" The motor which may be forthcoming will be essentially soundless, vibrationless and heatlesso As a means of propulsion in flight, its potentialities already appear to have been demonstrated in model disc-shaped airfoils~ a form to which it is ideally adaptedo These model airfoils develop a linear thrust like a rocket and may be headed in any direction"
~ 6-

The discs contain no moving parts and do not necessarily rotate while in flighto In atmospheric air they emit a bluish-red electric coronal glow and a faint hissing
sound~
Rocket-type electrogravitic reactor motors may prove to be highly efficient~ Theoretically~ internal resistance losses are almost negligible and speeds can be enormous a The thrust is controllable by the voltage applied, and a reversal of electric polarity may even serve as a brake (or if maintained~ reverse the direction of flight)~
A tentative theory of the electrogravitic motor has been fairly well worked out and seems to be substantiated in all tests to datea However, there are certain variable factors which are not completely understooda For example 9 there are tidal effects apparently caused by the Sun and Moon which influence to a small extent the power developed~ There are anomalous sidereal effects which seem to be related to the passage of the Earth through diffuse clouds of cosmic dust or electrified particles ejected from the SUDa There is DO assurance that large-scale experiments might not reveal additional unknowns, and it is felt that only by continued research and successively more advanced steps can the ultimate development be realized~
- 7-

RESULTS OF RESEARCH TO DATE:
The Biefeld-Brown Effect was first observed in the movement of electrically-charged massive pendulums 0 It was subsequently observed in the movement of electrical condensers of various mass which were similarly suspended and then chargedo Mechanical forces, proportional to the mass of the charged elements i were revealed which tended to move the condensers bodily, causing them to behave as if they were "fallingU in the "gravitational" sense o These early results were surprising for the reason that they failed to reveal a directional effect with respect to the gravitational field of Earth, but showed only a dependence upon the mass (m) of the electrified bodieso
In the years since the Biefeld-Brown Effect was first observed, other data have indicated this relative independenCe from the field of the Earth, and now a satisfactory explanation has gradually evolved which removes the apparent paradox 0 The result has been more fortunate than unfortunate from an ultimate practical standpoint - for it has provided a theory for a gravitational drive virtually independent of the gravitational field of the Earth, Hence, it would follow that the acceleration and control of electrogravitic spacecraft would be relatively unaffected upon leaving the
- s-

gravitational influence of the Eartho
Several forms of electrostatically-powered motors have been designed which have seemed to indicate various degrees of gravitational characteristicsa However, even the best efforts have been crude and the results complicated and difficult to analyzeo
In general j two types of motors have been built:= those with internal dielectric and those with external dielectric a The Townsend Brown Differential Electrometer, an automatic recording device which has been operating satisfactorily for many years, is an example of the former type a The various small models of boat motors which have been constructed are also of this typeo The disc airfoils are of the second type, and these show rather surprising laboratory performance; but are extremely complex theoreticallyo
Captive disc airfoils 2 feet in diameter, operating at 50 KV, have been found to develop a speed of approximately 17 feet per second in full atmospheric pressure. The speed appears to be at least proportional to the voltage applied and probably to some as-yet unknown exponent of the voltage a
- 9-

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Based on rough extrapolations from performance charts of laboratory models, the estimated speed of larger noocaptive flying discs operating at 5000 KV may be 1150 miles per bour even with atmospheric resistanceo It seems not unreasonable to believe that, with voltages and equipment now available, speeds in excess of 1800 miles per hour may be reached by proportionately larger discs operating at the same voltage in the upper atmosphereo
ELECTROGRAVITATIONAL COMMUNICATION SYSTEM (Electrogravitic induction between systems of capacitors involving propagation and reception of gravitational waves)
Project started at Pearl Harbor in 19500 Theoretical
background examined and preliminary demonstrations witnessed by Electronics Officer and Chief Electronics Engineer at Pearl Harbor Navy Yardo Receiver already constructed detects cosmic noise Which, according to supporting evidence 1 appears to emanate from that portion of the sky near the constellation Hercules (16h RA, 400 N Dec1,) • Transmitter designed and now partly completed, Radiation is more penetrating than radio (has been observed to pass readily through steel shielding and more than 15 feet of concrete),
- 10 -

.' In 1952 a short-range transmitting and re~eiving ~"
system was completed and demonstrated in Los Angeles. Transmission of an actual message was obtained between two rooms - a distance of approximately 35 feet.
Transmission was easily obtained through what was believed to be adequate electromagnetic shielding, but this test must bear repeating under more rigorous control. See definitive experiments (Group B) hereinafter proposed.
- 11 -

DEFINITIVE EXPERI~lliNTS
Group A ~ FIELD RELATIONSHIPS
Purpose: The tentative theory implies that the basic relation-
ship between the electrodynamic field and the gravitational field is revealed 1rduring the process of charging or dis= charging electric capacitors""
Proposal: A basic experiment is proposed in which two or more
large high-voltage capacitors are associated spacially with a standard geophysical gravimetero Careful observations are made of the gravitational anomalies induced in the region which accompany the change in electrical state" Studies are proposed of the effects of varying total capacitanc8 9 rateof-change of electric charge j mass of dielectric materials, specific inductive capacity (K) of such materials and whether the spacial effects are vector or scaloro These investigations shall be directed toward the derivation of a satisfactory mathematical equation including all of the above factorso
- 12 -

This work is to be augmented by basic studies on variations in Earth charge (believed to be caused by natural electrogravitic induction) to be carried on by Stanford Research Institute in cooperation with the Division of Statistical Analysis of the Bureau of Standards.
- 13 -

Group B - WAVE PROPAGATION
Purpose:
Preliminary experiments have indicated the existence of an inductive inter-action between two independent shielded capacitorsc In these experiments s a discharging capacitor induces a voltage in an adjacent capacitor and the effect appears to penetrate electromagnetic shielding, Theoretically, this effect of one capacitor upon another appears to be of electrogravitic nature and constitutes evidence of a new type of wave propagation which may eventually be utilized in a completely new method of wireless eommunicationo
Proposal,
It is proposed that progressively larger-scale and longer-range transmissions be conductedo Beginning with untuned systems, laboratory tests are proposed to explore the basic electrogravitic relationships between simple systems of capacitors o Then, progressing to tuned systems~ and pulsed (radar) applications, large-scale out-of-door demonstrations are suggesteda Such demonstrations shall be conducted between sUitably protected transmitting and receiving rooms (preferably underground) which are thoroughly shielded against electromagnetic (radio) radiation, Appro-
- 14 -

pria~e studies of wave attenuation due to transmission through sea water and large masses of earth may then also be undertaken.
This work is augmented by the basic studies on massive high-K dielectrics proposed for the University of Chicago o Calibration of receivers for natural cosmic noise or terrestrial variables is to be done at Stanford
Research Institute, Menlo Park, California,
- 15 -

Group C - PONDEROMOTIVE FORCES IN SOLID DIELECTRICS
Purpose:
Investigations started in 1923 to ascertain nreasons for the movement of charged capacitors" point to the existence of a hitherto unrecognized ponderomotive force in all dielectrics under changing electric strain. This force appears to be a function of the specific inductive capacitance (K) and the density or mass (m) of the dielectric material, as well as voltage factors. Recent availability of the massive barium titanate high-K dielectrics give promise of developing these forces to the point where they may become of practical importance in specific propulsion applications o
Proposal:
Beginning with a careful mathematical analysis of the Townsend Brown Differential Electrometer (an instrument developed at the University of Pennsylvania and at the Naval Research Laboratory and which has been in almost con~inuous operation for over 20 years), studies are proposed of the forces developed in mica, glass, marble, phenolics and dielectrics in general and then~ in particular, the newer
- 16 -

barium titanate ceramic dielectrics~ It is proposed that laboratory scale models of both rotary and linear "motors" be constructed and subjected to exhaustive performance tests o After suitable preliminary engineering development; it is suggested that a 500 lb~ motor be constructed to propel a model ship, as a practical demonstration of one of the possibilities of the electrogravitic drive.
This work is to be augmented by basic studies of the original Biefeld-Brown experiments, conducted under carefully shielded and controlled conditions in vacuum or under oil. It is proposed that these supporting studies be carried on as pure research projects at the University of Chicago.
The space-couple experiments, including a repetition of the classic Trouton-Noble experiment but using high-K dielectrics, are to be performed at The Franklin Institute in Philadelphia under Dr o Co To Chaseo (For the participation of The Franklin Institute, see appendiX) 0
Low-temperature experiments (using the liquid-helium cryostat) are likewise proposed for The Franklin Institute. These studies, under the personal supervision of Dr o W. F. Go Swann, are to be so designed as to provide answers to certain questions relative to the fundamental
- 17 -

nature of gravitationc They are to embrace such subjects as the "Anomalous Mass of the Electron in Metals" and the "Behavior of Super-cooled Massive Dielectrics"o
A special library project, housed at the Franklin Institute and supervised by Dr c Swann, is to serve as a clearing house and repository for information on the subject of field theories and gravitatioDo Whenever indicated, consultations on mathematical considerations j field theories and implications of Relativity are to be held with the Institute for Advance Studies at Princeton.
- 18 -

Group D - REACTIVE FORCES IN FLUID DIELECTRICS
Purpose:
Studies of boundary forces (where electrodes are in contact with fluid dielectrics) reveal the existence of a "complex" of inter-acting forces, some of which are purely electrostatic, some electromagnetic and some which could be electrogravitica The tentative theory requires these electrogravitic forces to be present wherever a mass of dielectric material is charged and moving, and to increase in almost direct proportion to the volume of the fluid which is charged and moved a Hence it is, in a sense, the juxtaposition of the elements of the static form of capacitor described in Group C experiments, and provides what may be described as an electrokinetic propulsive system, with possible applications to high-speed aircraft and spacecrafto
Proposal:
It is proposed that electrically-charged circular airfoils be mathematically analyzed and improvedo Starting
with 2 ft. discs at 50 KV, the steps of the development should include 4 ft. discs at 150 KV and a final 10 ft.
disc at 500 KVo Careful measurements are to be made of
- 19 -

both static and dynamic thrust. Studies are also proposed wherein the discs are adapted for vertical lift (levitation) as well as for horizontal thrust and this feature may be incorporated in the design of the 10 ft. demonstration model.
It is proposed that studies likewise be made of various methods for obtaining the required high voltages, and these studies should include the development and evaluation of the capacitor voltage multiplier and the ":flame-jet" electrostatic generator (to provide up to 15 million volts).
This work is to be augmented by the pure research projects, which are proposed for the University of Chicago, to answer certain questions as to relative efficiency of propulsion of discs in air at reduced pressure or in vacuum and at various voltage 5 0
- 20 -

IMMEDIATE USES IF EXPERIMENTS PROVE TO BE POSITIVE:
Confirmation of the existence of the electrogravitic couple may provide basic facts and figures which could lay the groundwork for major advances in propulsion and communication. It would initiate changes in existing concepts of the theory of Relativity and the physical nature of gravitation,
and certainly provide a basis for utilizing, in a practical way, hitherto unrecognized principles. It would start a major revolution in the science of physics, with profound repercussions in astronomy, chemistry and biology. In its timeliness and provocative influence, it may become a "shot heard round the world",
Propulsion:
Mankind has shown a persistent aptitude to devise means for traveling at ever-increasing rates of speed. At a certain stage in the evolution of each device
for transportation, limits have been reached beyond
which he could not go. The ox-cart, the automobile, the airplane and the rocket, all have limits of speed
which are basic and impossible to violate. The speed
- 21 -

of the rocket, man's latest attempt, is limited by the velocity of the ejected gases, and this imposes upon the rocket a limitation of speed and range which man is reluctant to accepto In the coming age of space satellites and possible travel to the Moon, man will be casting envious eyes toward inter-planetary travel - travel into the depths of space where he may not even live long enough to complete his journeyo It is already becoming apparent that the rocket must be superseded and speeds even further increasedo The recognition of this obvious fact, even to rocket engineers, serves to dampen much of their enthusiasm about the practicability of travel by rocket spaceship. Fuel is
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consumed in "fighting" the gravitational field of the Earth. Fuel will be required in breaking the rate of fall, if and when landings are attempted on other planetsg It is quite apparent that a method of controlling gravitation is urgently needed and that it is already long overdue.
Two types of electrogravitic motors are proposed in Project WINTERHAVEN. Both types have a good chance of success. A motor weighing 500 lbs. for the propulsion of a model ship is suggested. Performance data derived from the tests of this model may be used in designing
- 22 -

larger models, which in turn would presage electrogravitic motors for ocean liners weighing thousands of tons. Other possible applications, in due time, would include motive power for automobiles and railroads.
The second type of electrogravitic reactor now demonstrated in disc airfoils may find its principal field of usefulness in the propulsion of spaceships in various forms. For the moment, at least, the disc form appears to have the greatest promise, largely because there is reason to believe it can be selflevitating and, therefore, made to possess the ability to move vertically (as well as horizontally) and to hover motionless, in complete control of the Earth's gravitational field.
Communications:
No person would have believed - if he had witnessed the original experiments of Prof. Hertz - that the obscure phenomenon would lay the groundwork for worldwide radio communication, radar; television and the countless electromagnetic devices of this kind which
today we take so much for grantedQ
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We have had, in our lifetime, the privilege of watching the growth and approaching culmination of the radio ageo Yet, with all its manifest advantages, the electromagnetic wave has many limitations, and these are becoming increasingly apparent to us as over-crowded channels, annoying interference, blank-outs and shadows. We have become acutely aware of the troublesome limitations on television caused by the curvature of the earth and the shaded areas behind mountains, hills and large buildings, where satisfactory TV reception is virtually impossible o We sense that present methods are imperfect and inadequate and that somehow, in the future~ an answer will be foundo
If the basic experiments set forth in Project WINTERHAVEN prove the controllability of the gravitational wave, a fundamentally new system of communication will become available 0 Theory indicates that the gravitational wave may be one of the most penetrating forms of radiant energyo Employed as a means of communication, it may solve many of the difficulties inherent in present-day radio and, at the same time, provide countless additional channels for communication o
At the outset, development of the electrogravitational communication system obviously could provide a secret, almost wholly untouchable, channel for classified military communicationso Message transmissions could be put through without
- 24 -

breaking military radio silence, at a time when all electromagnetic transmissions are prohibitedo Due to the high penetrability of the gravitational wave, communications could conceivably be maintained between submerged submarines, between submarines and shore installations or between bomb-proof shelters and similar underground installations without the use of external wireso
Other interesting possibilities virtually suggest themselves o Among these are the applications to undersea or underearth radar, also various remote control applications for guided missiles, where the usual antennae or dipole systems involve complications or create engineering difficulties because of the shielding of the metallic covering of the missileso
Detection of distant atomic explosions
Due to the tremendous momentary displacement of air and the gravitational disturbance resulting therefrom, there is reason to believe that the electrogravitational receiver may be one of the few devices capable of instant long-distance detection and ranging of atomic bomb explosions.

Washington, DoCo
Revised: 1/1/53

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GENERAL OBJECTIVES
In the foregoing project outline, specific details have been referred to for the purpose of imparting a clear and concise understanding of the type of investigations proposedo The general objectives of Project WINTERHAVEN embrace the entire subject of the interrelationships between gravitation and electrodynamicso
This is necessarily a long-term programo Unquestionably
there are many productive avenues of exploration in this vast and comparatively open territory which cannot be foreseeno
The project must adopt a policy of inviting suggestions from qualified physicists interested in attempting to solve the various problems Involvedo In a project of this scope and magnitude it would be a mistake to fail to recognize and investigate any phenomenon which bears even remotely upon the subjectD It would be a mistake, for example, to limit the considerations to the so-called capacitor-effect, as outlined hereinbefore, when its technical antithesis, a possible inductor-effect, may provide equal opportunitieso
In the study of physical properties of dielectrics, low-temperature research is of especial importancea Electrodynamic phenomena occur at low-temperatures which are com=

,,
pletely unknown at room temperatureso The possibilities of discovering wholly unsuspected gravitational effects below the super-conductivity threshold. at temperatures approaching absolute zero j are worthy of the costs involvedo The use of the liquid helium cryostat is strongly recommended as an important part of Project WINTERHAVENo
The operation of a library project such as that proposed for The Franklin Institute, for the accumulation of technical information and to serve as liaison with academic institutions throughout the world, is of utmost importance particularly at the beginning of the programo
No responsibility can be assumed by any of the cooperating institutions to guarantee results in researcho It is the express purpose of the sponsors of this project to seek the answers by organizing a cooperative program in which the best minds and all necessary laboratory facilities are brought togethero It is the sincere hope that, in this way, a century of normal evolution in science, looking toward the ultimate control of gravitation for the benefit of mankind, may be compressed into 5 - 10 years o
As with the atomic bomb project in America, money was traded to gain time o So it is with the ultimate conquest of spaceo It must be recognized that a concentrated study of gravitation under a government research and development contract can no longer be neglectedo
~ 27 -

A P PEN D I X PAR TON E
FUNDAMENTAL RESEARCH
,,

A P PEN D I X

PROGRAM OF FUNDAMENTAL RESEARCH

Section A. The Franklin Institute of the State of Pennsylvania.
i~l Library project. Liaison With other academic institntionso ( c ) General oonsiderations of field theories and gravitation. (d) Repetition of Trouton-Noble experiment with high-K
dielectrics .,
(e) Low temperature research of electrodynamic phenomena using liquid helium cryostat.

Section B. Stanford Research Institute.

Repetition of Fernando Sanford experiments.

Studies of variation in electrical potential of the Earth.

Studies of electrOgravitic induction.

Development of a short-period gravimeter for capacitor

tests.,

.

Cooperation with Lear, Inc. in studies of field relation-

ships and gravimetric analysis.

)

Section C. Division of Statistical Analysis, National Bureau of Standards.

Ii!

Analysis of differential electrometer reccrdso

ff

11 capacitor mid=poifit variations.,

n

"Sanford variations"

Correlations with sOlar, lunar and sidereal time.

,fe)

n

n other natural variables.,

Section D. University of Chicago.

(a) Repetition of basic pendulum experiment (Biefeld-Brown

effect) in oil and other dielectric fLUids, and in

(bl vacUum"

.

.

Tests of ponderomotive forces in capacitors.

(c Quantitative effects·of K, m and other factors.

(d) Studies of high-K·massive dielectrics and relation to

foroes developed.

(e) Consideration of inductor=effect in relation to condenser-

effect.

(f) Thrust measurements of electrified disc airfoils in

air at reduced pressures, and in vacuum"

SEC T ION A
THE FRANKLIN INSTITUTE of the
STATE OF PENNSYLVANIA
.J

THE FRANKLIN INSTITUTE
OF THE STATE OF PENNSYLVANIA
PHILADELPHIA 3 ' PENNSYLVANIA
FOUNDED FEBRUARY S, 18H LABOllATORlES POR IU!SEARCH AND DEVElOPMENT
HIlNllT B. ALLBN
Dl-.
December 10, 1952
Mr. T. Townsend Brown The Townsend Brown Foundation
416 Bowen Building
Hashington 5, lJ. C•
.Dear Nr. Bro~m: lye enclose herewl th the proposals for work ~nier your Foundation, made out in accordance with our discussions of November 13.
As you will see, we have high-lighted the possib_Uities inherent in low temperature work involving the use of a cryostat. However, we have included the Trouton-Noble experiment and, ai' course, the genergl plan
£or theoretical work looking towards an analysis of the' situation with
regard to the relationship between gravitation and electrodynamics.
We shall, of course, hold ourselves ready for any further discussions of these matters 1I1hich -may seem desirable as a preliminary to the final statement of a definite program.
Ii:. was a great pleasure to have the opportunit-y to confer with you on these matters. Dr. Swann told me that he liked very much your approach to the problems, 3J1d we all hope that we may have the pleasure of serving the Foundation to the end of accomplishing some really good fundamental work for scieoce.
With kin:lest regards, I am
Encl.

THE FRANKLIN INSTITUTE OF ~E STATE OF PENNSYLVANIA INFORMAL PROPOSAL AND BUDGET ESTIMATE FOR RESEARCH IN PURE SCIENCE PREPARED FOR THE TOWNSEND BROWN FOUNDATION
CONTENTS:
Material submitted includes:
10 A proposal for initial support of library work, conferences, and travel, to facilitate cooperation with The Townsend Brown Foundation in Pure Science Studies in the fields of Electromagnetism and Gravitationo
20 A research proposal and budget estimate for a repetition under improved conditions of the classic Tronton-Noble experiment 0
30 A discussion of two fundamental experiments aimed at improving our knowledge of the behavior of electrons in solidso Included is information and cost estimates on the Collins Helium Cryostat, which would be essential in performing these experimentso
40 A discussion of further work in Pure and Applied Science directed toward improving our knowledge of the Solid State, and particularly our knowledge of high K dielectrics. Such studies would widen the frontiers of Physical Science and would ~e facilitated by the use of low temperatures
A-l

as provided by liquid helium. l
A short statement on ways to approach a better understanding of gravitation, electromagnetism, and relationships between the two subjects.

INTRODUCTION:

In two visits and various correspondence, Mr. T. Townsend

Brown has indicated his interest and that of The Townsend

Brown Foundation in certain aspects of Pure Science. Interest

has also been expressed in the possibility of supporting

)

research work in these Laboratories, with scientific discovery

and publication the principal objective.

The attached proposal discusses in turn the various items of interest which have been under consideration by Mr. Brown and members of the research staff of these Laboratories.

A-2

I. Proposal for preliminary grant to support exploration
) of the fields of interest to Mr. Brown and the Fonndation.

It is requested that The Townsend Brown Foundation grant to The Franklin Institute Laboratories for Research and Development the sum of $5000. for the following purposes:

A. To support exploratory work, including literature

surveys and conferences, on the sUbjects of gravi-

tation and electromagnetism.

B. To establish a working arrangement with the

Foundation so that ideas of mutual interest may

be effectively pursued.

}

C. To support the expense of further discussions so

that additional interests of the Foundation may

be explored and studied.

Expenditures under this grant would consist of salaries and overhead, and travel expenses. Personnel
involved would be chosen from the 250 staff members of
the Laboratories, their supervisors, or Senior Staff Advisors, according to the field under discussion and the special interests and training of the individual.

A-3

II. Proposal and Budget Estimate for Repetition of the Tronton-Noble Experiment.
The Townsend Brown Foundation has expressed particular interest in the Trouton-Noble experiment, and has a desire to see the experiment repeated under improved conditions.
The Trouton-Noble experimen~ concerns itself with an electromagnetic torque operating on a charged condenser which moves with uniform velocity in the direction inclined to the normal to its surface. According to the theory of relativity, compensating effects, in this case having to do with the effect of motion on elastic proper-
)
ties of materials, arise to defeat what would otherwise be the rotation produced by the torque aforesaid.
In the days before universal acceptance of the theory of relativity, there was reason to believe that measurements of the rotation of such a condenser as the above, when supported by some suspension, would serve to determine the velocity of the earth's motion through space.
If, fer a moment, we put ourselves in the mind of one who does not accept the theory of relativity in its entirety or wishes to test its validity further, the
A-4

)

torque described above and possible rotation resulting

from it become matters of experimental interest. A

situation of great interest centers around the effect

of the dielectric materials in the condenser in deter-

mining the torque.

Now it appears that the original calculation of the aforesaid torque is completely erroneous; and it appears that if the torque had been calculated correctly; invoking the same fundamental principles as were invoked in the earlier calculations, it would have been found to depend only upon the potential difference between the plates of the condenser and to be independent of the dielectric constant. However, a more refined analysis
)
of the situation, which does not simply average the properties of the polarized molecules into a representation in terms of a dielectric constant, reveals that there may be a contribution to the tor~ue which depends on the nature of the molecular dipoles, and in a manner which is not expressible in terms of the dielectric coefficiento

The above conclusions have been reached by E. H. Kennard and W. F. G. Swann independently by different processes of mathematical analysiso' They would have rendered the Trouton-Noble experiment one of considerable interest to a person who had any doubts about the theory of relativity, and the interest would be enhanced

A-5

by the bearing of the nature of the dielectric material upon the outcome of the experiment.
The present proposal for this experiment is sub-
mitted because of Mr. Brownts expressed interest in its
bearing on dielectric characteristics. We feel, however, that there are better ways of investigating dielectric phenomena, some of which are discussed below. In connection with studies of the relationship between gravitation and electromagnetism, again there are more effective procedures; this question is discussed at greater length in a future section of this proposal.
Even though we would not have initiated a recommendation for a repetition of this experimept at this time, it could be performed if desired by the Foundation. A grant of $15,000 for research, overhead, and materials and supplies, would cover the performance of this experiment over the period of a year.
A-6

III. Discussion of two fundamental physical experiments, and proposal and budget estimate for the Collins Helium Cryostat, necessary for the performance of these experiments.

A. Experiment having to do with the observation of momentum in a ring of conducting material carrying a current at the instant when the material is carried from the super-conducting to the oonsuperconducting stateo

Briefly, the above experiment envisages a metal

ring in which a current of electricity has been produced

)

by the creation of a magnetic field passing through the

ring when all is at a temperature such that the super-

conducting state prevailso Under such conditions, the

current will continue practically ind~finitelyo

If we now raise the temperature, the super-conductivity will disappear at a certain critical temperature, and the angular momentum of the electric current will be shared with the ordinary material of the ring in such a way as to give an angular rotation to the latter. The ring is, of course, to be envisaged as supported by a suspension and the angUlar rotation observed will depend upon the stiffness of this suspension. An interesting feature of the experiment lies in the fact that the sensitivity is

greatest when the cross-section of the wire of the ring is smallest. The limiting conditions which determine the ultimate sensitivity are based upon the requirement that when the energy of the current is dissipated and passes through the super-conducting state, the heat evolved shall not be sufficient to burn up the apparatus.

The fundamental theoretical interest of the experi-

ment lies in the fact that the angular rotation obtained

depends upon the electronic mass, and theoretical con-

siderations have been presented to support the belief

that this electronic mass may be different for the

)

electrons in a metal than for the electrons in a free

state.

The aforesaid theoretical considerations bearing
,
on the electronic mass are the work of physicists at other institutions and we believe that most authorities on quantum theory are of the opinion that the effective mass of the electron in a metal is the same as that for an electron in a free state. However, even those who support this view are in favor of performing the experiment because of the complexity of the theoretical coosiderations involved.

We may say that the concept of this kind of experiment goes back to the time of Maxwell. Some 45 years ago,

A-a

Dro Swann became interested in the possibilities of an experiment of this kind, but that was before the days when we knew of super-conductivity, and the potentialities of the experiment under such conditions did not seem promising.
When Dr. Imre Patai came to The Bartol Foundation of The Franklin Institute, he brought with him an interest in this experiment and it was one of the experiments which we had planned to perform if he had lived. Tentative arrangements for securing liquid helium were discussed with the U. S. Bureau of Standards. Dr. Patai had worked out the theory of the experiment in elementary form and Dr. Swann made a calculation of it based on more general considerations and traced the consequences of the calculation as regards defining the conditions of limiting sensitivity, etc., as cited above.
The most fundamental requirement is, of course, a means of producing liquid helium, and this implies a cryostat. If a cryostat were obtained, moreover, the potentialities of an enormous amount of other work in solid state physics would be provided for. In this respect, an experiment of this kind has an advantage over such an experiment as a repetition of the Trouton-Noble experiment. In the repetition of the Trouton-Noble experiment, the usefulness of the apparatus vanishes

,,

when the observations are completed. In an experiment

involving a cryostat, however, the completion of the

immediate undertaking leaves an organization of equip-

ment and procedure which is available for a large

amount of very valuable scientific work of other kinds.

The cryostat itself would involve a room, probably some 20 feet square, and would cost about $24,000. It would require about 1-1/2 men to operate it. Information on the cryostat is attached.

It is probable that the experiment in question

could be carried out and the cryostat could be operated

by calling upon the services of one full-time physicist

)

and two technicians.

It should be possible to complete the experiment in one year.

Personnel, and expenses other than that for the cryostat, would be supplied by the Institute.

It may be remarked that if we are able to act qUickly in the matter of a cryostat, we have the possibility of securing a man thoroughly skilled in the operation of the equipment.

Intimately related to the foregoing experiment is another which will now be described.

A-10

B. An experiment to test the electromagnetic equations for the super-conducting state.
Among the many interesting phenomena which occur at low temperatures, super-conductivity has long held the attention of experimentalist and theoretician alike since its discovery by H. Kammer1ingh Onnes in 1911. With the discovery of the Meissner effect in 1933, the basic experimental behavior necessary for the development of an electrodynamic theory of super-conductivity has been established.
F. and H. London, in 1935, developed a set of equations which describe the macroscopic electrodynamic behavior of super-conductors in a satisfactory fashion. These equations have not been tested in a quantitative manner at the
present time. One experiment which w.ould shed considerable
light on the correctness of these equations has been suggested by F. London. This experiment involves a study of the magnetic properties of a rotating sphere. The theory of this experiment is worked out in complete detail by F. London. We shall give below a physical description of the nature of this experiment.
Consider a sphere of radius R. If we start with the sphere at rest below its super-conducting transition temperature and bring it into motion with uniform angular
A-11

velocity ~ , then by considering the super-conducting electrons as perfectly free it can be deduced that the sRhere should become magnetized upon rotationo The reason for this is as follows:
When the sphere is initially set into motion the electrons, being perfectly free from interaction with the crystal lattice, will not move with the sphere, and a current is set up due to their relative motiono This changing current in turn induces an electric field within the sphere which acts on the electrons in such a manner as to accelerate them in the direction of rotation of the sphere. The final result is that when the sphere has reached a constant angular velocity the super-conducting electrons everywhere move with the sphere except for a narrow layer at the surface, where they lag behind slightly to produce a small current o This result was predicted on the basis of a free electron theory before the development of the theory of F. and H. London.
The London theory predicts the same result for the rotating sphere, except that it makes an additional prediction. F. London states that the rotating sphere will have a magnetic moment independent of the prehistory of the sphere. In particular, if a rotating sphere is cooled below its transition temperature while rotating, the sphere will acquire ,the same magnetic moment as it
A-12

would upon starting from rest below its transition

temperature and being brought to the same angular

velocity. On the basis of a free electron theory of

super-conductivity, it is difficult to understand how

a sphere which is already rotating will suddenly acquire

a magnetic moment upon being cooled below its transition

temperature. In this case, the electrons move with the

sphere above the transition temperature due to their

finite interaction with the lattice (finite resistance).

That they should SUddenly lag behind to produce a mag-

, ~I

,,

,

netic moment on cooling below the transition temperature

,i;

seems surprising.

!'

The magnetic moment predicted for the rotating sphere is small, but should be measurable with sufficiently careful experimental technique. This experiment would constitute a fundamental method of te~ting the basic assumptions of the London theory.

c. Matters concerning the creation of a low temperature
laboratory.
It is to be supposed that the cryostat, if secured, would become the property of The Franklin Institute Laboratories for Research and Development. It seems appropriate, however, to recommend that the low temperature laboratory be given some designation which would

A-13

serve to perpetuate the organization concerned in donating the equipment. Thus, if the cryostat should be provided by The Townsend Brown Foundation, it would seem appropriate that the laboratory be called the "Townsend Brown Laboratory for Low Temperature Research".
Such a procedure would provide the means for crediting the Foundation with respect to all publications which would subsequently emanate from the Laboratory. It may be remarked that continual financial support of the operation of the Laboratory by the Foundation would probably not be necessary; for once the Laboratory became established, there would be very little difficulty in obtaining Government and possibly other support on a high level of allotment for the purposes of carrying on the work of the Laboratory.
In a following section we have outlined some of the types of problems which might be expected to be carried on by a low temperature laboratory of the above kind. We also include a Bibliography of work which has already been published in the field of Low Temperature Research.
I
I,
I,
A-14

Extreme low temperature research such as the following is being carried out in the many university and industrial laboratories equipped with ADL Collins Helium Cryostats.

Measurement of the mechanical properties of metals.

Study of the superconductivity of solids.

Investigation of the namce of nuclear forces.

Magnetic susceptibility measurements on paramagnetic salts.

Second sound measurements in liquid helium.

Experiments on the paramagnetic resonance absorption of solids.

Study of phosphors and semiconductors for detection of infrared radiation.

Investigation of the properties of liquid He3•

Measurement of the rate of transfer of the He 11 film over various surfaces.

Interpretation of the optical absorption of solids.

I

I

Study of electronic communications and control pcon~sses.

.!

•

The development of t}.Ie ADL Collins Helium CryosttJt tIS a reliable metltH for the quantity production nf Uquki helJ"um hrn brtJught tm ent;"'e field of research, previously carried on in only tJ few laboratories, ,nto the range of every·day ,nvtW'gott;Qn and use. Phenomena wh#h have been known to occur in tbe neighborhood of Absolute Zero, and those which have recently been discovered, had not been exploited for useful purposes simply because of the excessive effort required to obtdin these low temperatures.
The K",nl'rczl effect of extreme low temperature is the production of ordered rttftl'~ of atnms and electrons. Study of mailer In an ordered state has revealed VQriations in behavior whkh at higher temperatures were TnQsked by thermal motion. These phrnomena have nuule low temperature one of the most fascinsting and fertile fronliers of current physical research, with practical development now only a question of time and research.
Low-temperature physics is a technique which will make itself felt in all fields of pure and applied physus and engineering when the variety of uses 10 which it may be pUt is more fUlly realized.

Boiling Points of Gases
at 1 Atmosphere
°t Of 0,

IIetiuml

-269.9 -4S3.8 3.2

Helium~

~268.9 -4S2.0 '.2

Hydrogen Deuterium

-2S2.7 -472.9 20.4
-249.5 --m.l 23.6

TritIum

-24B.0 -414.4 2S.1

Neon

-245.9 -410.6 27.2 ,

Nitrogen

-19S.B -320.4 77.3

(orbon Monoxide -192.0 -313.6 81.1

Auorine

-187.0 -304.6 ••0

O''x'~''e'n

-185.7 -302.3 87.4 -183.0 -297.4 90.1

IV. Research in solid state phenomena with special relation to dielectrics of high' specific inductive capacity.
It is our understanding that researches on substances with high values of K are of considerable interest to The Townsend Brown Foundation, and we have no hesitation in concurring in the importance of such researches. It would seem that further investigation of the properties of substances of high K should be made in the realms of breakdown resistance, ferro-electrets, hysteresis, and allied phenomena. Special interest attaches 'also to the characteristics of electrets as such and to the conditions necessary to secure high activity of such electrets over long periods of time.
In all of the foregoing work, low temperature researches involving the cryostat would ,be of fundamental importance; for although the dielectrics are not usually used at low temperatures, many of the ch~racteristics which determine their behavior at ordinary temperatures can be examined more readily by experiments performed at low temperatures.
In view of the Foundation's interest in dielectric phenomena, we shall discuss this field first.
A-15

A. Proposal for a program on dielectric measurements at low temperatures.
A survey of the literature on low temperature phenomena shows a large amount of work which has been carried out on the properties of paramagnetic salts, whereas the properties of dielectric materials have hardly been investigated at all. The reasons for this difference in emphasis are easily understood. At liquid helium temperatures, the system of magnetic moments in most of the common paramagnetic salts is still in a thermally disordered state so that its magnetic properties are still varying with temperature in an interesting fashion. In addition, since the technique of adiabatic demagnetization of a paramagnetic salt is the sole means, at the present time, of producing temperatures well below 1 0 K, it is only natural that a great ?mount of effort has been spent in the elucidation of the properties of these materials.
Most normal dielectric materials show a negligible variation of their dielectric properties with temperature, especially in the liquid helium region. This may be seen by looking at the main sources of polarization in a dielectric, namely:
A-16

1. The electronic polarizability, which arises from the fact that the outer electrons of an atom can be displaced with respect to the nucleus by an external electric field thereby creating a dipole moment. This is a property of the particular atom under consideration and is independent of temperature.
2. The ionic polarizability, arising from the displacement of positive ions with respect to negative ions in an ionic crystal. In most materials, this type of polarizability varies only very slowly with temperature, leading to a slight variation of dielectric constant with temperature. That this is not always the case is the reason for the present proposal.
3. Polarization due to the alignment of molecules with permanent dipole moments. In solids, where the molecule is not free to rotate, this effect is absent.
In recent years, a number of ferroelectric compounds have been discovered which are practically completely analogous in their dielectric behavior to ferromagnetic materials. Thus, they show a Curie temperature, above which the dielectric constant follows a Curie-Weiss law and below which they exhibit spontaneous electrical polarization and hysteresis properties. Barium titanate (BaTiO))
A-17

is the most well known of these compounds. Most of these compounds have Curie temperatures which are fairly high. Two compounds are known which have very low Curie temperatures. These are Potassium Tantalate (KTaOJ) and Lithium Thallium Tartrate (LiT1C4H406.HzO), with Curie temperatures at 13.2oK and lOoK respectively. The existence of these very low Curie temperatures has created an additional interest in the study of dielectrics at the low temperatures obtainable with a Collins Helium cryostat.
In addition to the intrinsic value of a program on the properties of dielectrics at low temperatures, it is conceivable that it might be possible to provide another means of producing temperatures lower than 10K other than adiabatic demagnetization. If one had a ferroelectric material with a Curie temperature well below 1 0 K, then by the adiabatic, reversible depolarization of the material, it should be possible to produce a cooling effect (electro-caloric effect). Since the equipment involved in this process is somewhat simpler than in the corresponding magnetic case, it would be of considerable interest to investigate its feasibility. This method is not applicable below the Curie temperature since the presence of hysteresis and spontaneous polarization introduces irreversible heating effects upon applying or removing an external electric field.
A-iS

The Curie temperature of BaTi03 can be decreased by reducing the lattice parameter either by the addition of strontium or by application of external pressure. Presumably, this technique can be used to decrease the Curie Temperature of KTaO) or LiT1C4H406·H20. An understanding of the factors which influence the Gurie temperature and of the range of Curie temperatures in different crystals is important for the development of a basic theory of ferroelectricity.
In summary, it appears that a program on the properties of dielectrics at low temperatures can contribute substantially to our understanding of solids. We propose to carryon such a program at The Franklin Institute. The starting point for this program should logically be an investigation of KTa03 and LiT1C4H406.H20 as well as structurally similar crystals and their solid solutions with each other.
A-19

Bo Certain additional problems in which the cryostat can be of serviceo
Work concerned with Phosphors
The Bartol Foundation of The Franklin Institute has been concerned for some time in the investigation of phosphors, with particular relation to our studies leading to the enhancement of particle counter techniques. The properties of such phosphors are determined very largely by the presence of impurities in a manner which is rather well understood, but which calls for much further investigation.
Fundamental to the behavior of such phosphors is the postulated existence of certain energy levels, generally referred to as "traps", to which electrons may be raised by way of a conduction ban~ by suitable external stimulation, and from which they may depart, again through the conduction band, with the emission of light - frequently ultraviolet light.
The temperature plays a very important role in the theory of such emission and absorption of energy, and it is of great interest to investigate the behavior of these phosphors over as wide a range of temperatures as possible.
A-20

The particular interest of very low temperature measurements lies in the possible existence of traps very near (in energy) to the conduction band. If such traps exist, the light emission at low temperature would be drastically different from what it would be in their absence, both in amount and as regards time variation. Moreover, the study of light emission at these temperatures should lead to knowledge of the depths of the traps below the energy of the conduction band.
Co Piezoelectric and allied phenomena.
It is, of course, natural to include piezoelectric phenomena as part of basic research relating to any wide program concerned with dielectric material.
Requirements for the types of researches above suggested can vary over very wide limits depending upon the amount of work undertaken. As a rule, the apparatus involved is relatively inexpensive. Some of it is even of the old electroscope and tin can type. 'Valuable work could be done by one physicist and a technician working continually and supported by a very modest budget.
It would be possible to carryon a larger program with corresponding enhancement of the numbers of personnel.
A-2l

We can readily visualize 4 or 5 independent fields of research going on at the same time and involving perhaps 4 or 5 physicists, with an equal number of technicians.
Do Other work having to do with crystals.
While the cathode group of the Bartol Research Foundation has been concerned largely with the properties of semi-conductors, the interest has lain rather in the direction of high temperatures than low temperatures. Nevertheless, this work does ramify into a realm dealing with the fundamental properties of the crystalline structures which are concerned. Low temperature measurements have primary bearing upon optical phenomena concerned with these structures.
For example, optical absorption studies of thorium oxide have been made, and show a bell-shaped absorption
X. curve at 4000 ~. followed by a complete cut-off at 3700
For wave lengths longer than that corresponding to the maximum of the absorption bell, a monotomic decrease of absorption takes placeo There are reasons for believing that at low temperatures the width of the bell will decrease, and that further structure will appear which will be of interest regarding conduction theory.
A-22

The aforesaid narrowing of an absorption maximum at low temperatures is well known in the case of F centers in alkali halides, and has been used by Seitz as evidence that the F band in KBr is due to one kind of lattice effect only. Moreover, from the width and height of the band, the number of absorption centers caD be computed.
As the band narrows, the maximum shifts to shorter wave lengths. The theoretical implications of this phenomenon have not yet been worked out.
A shift to shorter wave lengths is found also for the fundamental absorption band, as well as for absorption due to color centers. This shift is presumably to be associated with thermal perturbation of the levels of the valance electrons.
In general, it caD be said that, when phenomena involving very shallow traps are involved, low temperatures are required for the phenomena to appear. At higher temperatures the electrons do not remain in the traps for an appreciable time. These characteristics are, of course, in harmony with those already discussed in connection with phosphors o
A~3

In the case of oxygen-rich thorium oxide, a reddening

R. is produced by irradiation witb light of 4000

This

color is stable at 300~ and bleaches rapidly at 500°.

It is possible that, at low temperatures, additional

forms of radiation coloring will appear, such coloring

being thermally destroyed at room temperature.

Vo Researches seeking to discover a relationship between electrodynamics and gravitation.
It is our understanding that The Townsend Brown Foundation is greatly interested in such a project as would be defined by the above heading. It is to be remarked that the problem of relating gravitation to electrodynamics and the quantum theory is one which has taxed the ingenuity of some of the best mathematical brains for the last 30 years. As yet ,DO very complete satisfactory resolution of the matter has been found. However, we are not completely in the dark with regard to ito
Thus, the so-called ured-shift" produced by gravitation, and even the deviation of light by stars, are phenomena which are concerned with the relationship between gravitation and electrodynamics. The magnitudes of these phenomena, however, are so small that even the red shift, for example, which is measured in a gravitational

A-24

field some 50 times that of the earth at its surface, or in a gravitational potential some 2500 times that of the earth at its surface, is a quantity so small as to tax the ingenuity of our most refined experimentalists.
No one can deny the possibility that there may arise a Newton who so revolutionizes all of our previous thoughts on gravity, electrodynamics and quantum theory as to render the story of the interrelation of these fields one of consistency and satisfaction. No one can deny that that interrelationship would have very profound significance. Even if it does, however, it would seem likely that smallness of magnitude of the interrelationships, as pertaining to any terrestrial experiments, would continue to exist and that any practical bearing which the interrelationships might have upon us would lie in their effects in some large-scale cosmological situation which they control and which, in turn, control our origin and existence.
We believe that there is much yet to be done in the correlation of our understanding of these matters and we believe that the work is worthy of effort. We are inclined to think, however, that it is rather of the longrange type.
A-25

For the foregoing reasons, we believe that some'thing may be achieved by what Mr. Townsend Brown has called the "library project" which, as its first step, attempts to ~ite a report summarizing the status of the whole problem, and suggesting avenue for its extension. It would seem natural to suggest that the Foundation should sponsor two types of investigation, one of the experimental character on other matters, and along the lines of the examples already quoted, and the other of the long-range theoretical type, looking towards an elucidation of some of the fundamental problems invo~ved, as aforesaid.
CONCLUSION:
The Franklin Institute Laboratories for Research and Development welcome this opportunity for closer cooperation with Mro Brown and The Townsend Brown Foundation~ In case the Foundation desires to support a repetition of the Tronton-Noble experiment, this work could proceed at once, and occupy the time necessary to acquire a cryostat and' set the equipment in operation. Work on the two basic experiments outlined above would then proceed at our expense, with due credit to the Foundation for making this important work possible.
A-26