Harvard-Smithsonian Center for Astrophysics Harvard Observatory Plate Stacks RB Series Observing Logs Volume 2 20 May 1931 - 23 December 1931

Volume 01: 1928-10-31 - 1931-05-20 (00001-01740) Volume 02: 1931-05-20 - 1931-12-23 (01741-02377) Volume 03: 1932-01-03 - 1932-11-29 (02378-03718) Volume 04: 1932-12-01 - 1934-02-25 (03719-04883) Volume 05: 1934-02-25 - 1935-05-02 (04884-06140) Volume 06: 1935-05-04 - 1937-07-29 (06141-07499) Volume 07: 1937-07-30 - 1939-11-19 (07500-09253) Volume 08: 1939-11-23 - 1941-11-13 (09254-11163) Volume 09: 1941-11-14 - 1944-07-02 (11164-13002) Volume 10: 1944-07-09 - 1946-08-28 (13003-14739) Volume 11: 1946-08-29 - 1949-06-12 (14740-16312) Logbook displays in this window. To switch to two-window display, click here.

1931 Cover 002 004 006 008 010 012 014 016 018 020 022 024 026 028 030 033 034 036 038 040 042 044 046 048 050 052 054 056 058 060 062 064 066 068 070 072 074 076 078 080 082 084