(Documentary Artifact): One b/w photographic print of the interior of the Palomar Observatory, looking up through the opening in the roof of the dome. The derrick for lifting steel plates in place is visible.
Notes on verso of print:
OP 15362-248/ 86:15900-1129/ IN REF BOOK/ Looking through opening/ in roof of dome with derrick/ for lifting steel plates in place/ Oct 4 1937/ 965J/ [Stamped:] ED. H. DAVIS/ Mesa Grande, Calif.