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Annals of the Astrophysical Observatory of the Smithsonian Institution, Vol. 4 (Classic Reprint)

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Excerpt from Annals of the Astrophysical Observatory of the Smithsonian Institution, Vol. 4The present Volume IV of the Annals of... Weiterlesen
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Excerpt from Annals of the Astrophysical Observatory of the Smithsonian Institution, Vol. 4

The present Volume IV of the Annals of the Astrophysical Observatory covers a well-marked epoch in the work of the Astrophysical Observatory . Beginning immediately after the establishment of the real short-internal variability of the sun by the Algerian expeditions of 1911 and 1912, the period includes: The installation of the tower telescope on Mount Wilson in 1913 and the investigation there-with of the distribution of radiation over the solar disk and its variability; the preparation of automatic self-registering pyrheliometers, which, in 1914, were exposed from sounding balloons at an altitude of 25,000 meters with atmospheric pressure 3 centimeters, and giving there a maximum solar radiation intensity value of l.84 calories per square centimeter, confirmed our results on the mean value of the solar constant; the investigations of Clayton on the correlation of the Mount Wilson observation of the solar variability with terrestrial meteorological conditions; the establishment by the Smithsonian private funds of a station at Calama, Chile, cooperating with Mount Wilson in the observation of solar variability; finally, the transfer, through the generosity of Mr. John A. Roebling, of the Mount Wilson work to Mount Harqua Hala, Arizona, and of the Calama work to Mount Montezuma, Chile, so that the investigation of solar variability will be continued at two stations 4,000 miles apart in cloudless regions of the Northern and Southern Hemispheres, as far as possible daily, until it is determined whether this observation is a worth-while meteorological element for forecasting and for the study of the problems of the atmosphere.

The work described in this volume owes a very large part of its value to the following members of the Observatory staff: Mr. A. Kramer, for 30 years, instrument maker of the. Astrophysical Observatory, who has constructed nearly all of the apparatus employed in the research; Miss F. A. Graves, for 12 years computer; Mrs. A. M. Bond, computer since 1918; Mr. A. F. Moore, director of the Hump Mountain and Chile stations from 1917 to 1920, and now director at Mount Harqua Hala, Arizona - Mr. Moore's versatility, efficiency and enthusiasm, and the sterling character of his work have all been abundantly demonstrated - and Mr. L. H. Abbot, assistant at Hump Mountain and Chile from 1917 to 1920, and now director of the Chile station.

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Titel: Annals of the Astrophysical Observatory of the Smithsonian Institution, Vol. 4 (Classic Reprint)
EAN: 9780484750738
ISBN: 0484750739
Format: Fester Einband
Anzahl Seiten: 416
Gewicht: 709g
Größe: H229mm x B152mm x T26mm
Jahr: 2017
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