Reports On Observations of the Total Eclipse of the Sun, August, 7, 1869
Reports On Observations of the Total Eclipse of the Sun, August, 7, 1869
United States Naval Observatory
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A distant evenly illuminated background, is formed by a lens, will, it is believed, when taken in conjunction with the experimental proof shown to be afforded by photographs of all descriptions, completely set at rest the question of the cause of the "bright band" seen to border the eclipsing limb of the moon during the transit of the latter over the solar disk. And with the explanation of the phenomenon as simple diffraction light, the last prop that could even be sup- posed to support the the...ory of the existence of an appreciable atmosphere to the moon falls to the ground. * "The question discussed by Dr. Barnard as to the size and consequent visibility of the distinct fringes that must theoretically border the shadow of the moon occurred to me from noticing that Professor Alexander, in his f/ahrador expedition to observe the eclipse of July, 1860, directed the seamen on his vessel to watch for the possible appearance of sueli fringes, and that the men reported that they did indeed sec sonic ' Hying shadows" and a " slight quivering of the last beams of the sun.
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