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 212
Fig. 1—The Well of Eratosthenes. … Fig. 2—Newtons Reflector.PLATE XXXL Important Epochs ix AsTRoxo^rv 129 angular distance of the Sun from the zenith was found to beapproximately ^^oth of a complete circumference, or about 7°.If Syene is assumed to be directly south of Alexandria, thenit follows, from this observation, that the…
Astronomy
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
