Title: At the Cassegrain Focus
Date: 1934
Original Format: photograph: negative
Description: Perspective drawing with observer on elevator, aluminizing chamber below. Pencil on paper, 8 x 12 inches, mounted on board, 9 x 13 inches. Signed R.W.P., dated 1934. Palomar. Porter Papers.
Caltech Archives ID: RWP2.3-4
