The Cassegrain Coude focus. Alternative.
- The Cassegrain Coude focus. Alternative.
- Caltech Photographs
- Photographs of Individuals
- 1 photographs (negative)
- Perspective cutaway drawing of observing station built into trunnion. Pencil on paper, 12 x 9 inches, mounted on board, 13 x 9 inches. Signed R.W.P. and dated 1934. Palomar. Porter Papers.