The Adolfo Stahl lectures in astronomy, delivered in San Francisco, California, in 1916-17 and 1917-18, under the auspices of the Astronomical Society of the Pacific (1919)
Astronomical Society of the Pacific, Aitken, Robert Grant, 1864-1951 · San Francisco Stanford University Press · leaf 159
Fig. 2—Tlie Diffuse Nebulosity,N. G. C. II 5146. Fig. 3—The Dumb-Bell Nelmla. PLATE XXI. THE NEBULAE By Heber D. Curtis In the four lectures of the Stahl series which have precededthis one you have heard about that portion of the universe towhich our own Httle Earth belongs, you listened to…
Astronomy
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
