One of two sheets of photographs of the sun taken with a Dallmeyer photo-heliograph, at Wilna Observatory taken during Setember 1870. One of two sheets of photographs of the sun taken with a Dallmeyer photo-heliograph
Unmounted photograph 23" x 29 1/2" of the 72" reflecting telescope at the Dominion Astrophysical Observatory, Victoria, B.C. in Cassegrainian form as used in photographing Stella spectra Unmounted photograph 23" x 29 1/2" of the 72" reflecting telescope at the Dominion Astrophysical Observatory
Positive transparency of film, size 10" x 12", of Moon in the region of Clavius, Palomar 200" Hale Telescope Positive transparency of film