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
Eruptive prominence, photographed at the Kenwood Observatory, Chicago 1895, March 24, 22h. 40m. C.M.T. Eruptive prominence
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