Title: 1926JRASC..20....1Y Producer: NASA Astrophysics Data System - $Id: jb2pdf,v 1.3 2010/10/25 21:14:15 alberto Exp alberto $ CreationDate: Tue Jun 1 18:47:15 2021 Tagged: no Form: none Pages: 14 Encrypted: no Page size: 511 x 792 pts (rotated 0 degrees) File size: 200737 bytes Optimized: no PDF version: 1.7