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 177
Fig. 1—The Spiral Nebula N. G. C. 4527. Left: May 8, 1901. Right: April 16, 1915, showing Nova. North … Fig. 2—The Spiral Nelnila N. G. C. 4321. Left: April 19, 1901. showing Nova A.Right: March 2, 1914, showing Nova B. PLATE XXIV. Novae in Spiral Nebulae. Crossley Reflector Photographs. The Nebulae 107 by the discovery of novae in the spiral nebulae. More than adozen such new stars have been found…
Astronomy
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
