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Home > Art, Film & Photography > The Temperature of the Moon; From Studies at the Allegheny Observatory by S.P.Langley, with the Assistance of F.W.Very
The Temperature of the Moon; From Studies at the Allegheny Observatory by S.P.Langley, with the Assistance of F.W.Very

The Temperature of the Moon; From Studies at the Allegheny Observatory by S.P.Langley, with the Assistance of F.W.Very


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About the Book

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1889 Excerpt: ...found (about one-fortieth of that previous to the eclipse), but this was almost completely absorbed by glass, and presumably came from the still moderately warm surface of the moon. As the middle of the eclipse approached a still different effect was noted. Measures made in the penumbra, just outside the edge of the umbra, indicated an increasing transmission by glass, the value found thirty minutes before mid-eclipse being 32.1 per cent., while this very large transmission, at twenty-five minutes after the central position of the shadow, had still further increased to 48.2 per cent. Although the deflections were small, the instruments were in admirable condition and the observations are apparently trustworthy. A single measurement at the center in the penumbra, close to the edge of the umbra, as the eclipse was passing off, gave a transmission of 19.4 per cent., and a similar one at the southeast iimb gave 22.5 per cent., figures which do not differ greatly from the usual average. The effect, if real, is consequently a local one, attributable, perhaps, to differences in the rate of surface cooling or to irregular disposal of the sun's rays which have passed through the earth's atmosphere, either of which might temporarily alter the proportion of radiated and reflected rays. The eye observations which now follow gave evidence of anomalous distributions of light, which may perhaps be referred to variations in the terrestrial atmosphere at different points along the great circle at which the solar rays have touched the surface. The diminution of the light at mid-eclipse was unusually great, that limb of the moon which was most deeply immersed in the umbra appearing scarcely brighter than the unilluminated half at the first quarter. The illu-mination of the pa...


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Product Details
  • ISBN-13: 9781130241068
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 50
  • Spine Width: 3 mm
  • Width: 189 mm
  • ISBN-10: 1130241068
  • Publisher Date: 01 Mar 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 109 gr


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