Portion of the Moon (rough crater region above Mare Nubium) G.W. Ritchey and by F.R. Sullivan, with 40-inch Yerkes visual refractor colour screen, and isochromatic plate, 1901, November 21, age about 10 1/2 days, term about -38[o]m., exposure, 1 sec. Portion of the Moon; crater region above Mare Nubium
Glass positive of:- Great Nebula in Andromeda (M.31.N.G.C.224,205,221). Ritchey and Pease, Yerkes. 24-inch Relflector 1901, September 18. 14"x17". Prepared from negative R.A.S. No.98 Glass positive of:- Great Nebula in Andromeda
Glass positive of:- Great Nebulae in Andromeda (Southern portion) G.W. Ritchey, Mount Wilson Observatory 60-inch Reflector. 1909 October 13, 17"x14". Prepared from negative R.A.S. No. 402 Glass positive of:- Great Nebulae in Andromeda (Southern portion) G.W. Ritchey
