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The Observatory Volume . 16-17: (English)

The Observatory Volume . 16-17: (English)

          
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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. 1893 Excerpt: ... proportional to the difference of longitude; similarly the Sun's longitude on the observed date, when the same phase occurs by virtue of the annual term alone, should undergo like variations. The results are as follows: --427-day Period. Annual Period, bbserved date of Sun's longitude at minimum latitude. observed date of min. Pulkova 2,406,257 320-5 Berlin 203 335'6 Greenwich 207 300-0 "Washington 083 242-9 Madison 072 182-3 The above figures show beyond reasonable doubt that the direction of rotation for both periods is from west to east. In answer to objections raised by M. Cornu as to the reality of the phenomenon, and to the possibility that the residuals are results dependent on temperature and seasons, Mr. Chandler points out that the variation of latitude depends on two terms with periods of fourteen and twelve months, and therefore during a series of years the phases of the first term are subjected to every change of temperature dependent on season, and that while the phases of the second or annual term are synchronical with the seasons, as referred to any given longitude, yet the fact that they occur at times corresponding to the differences of longitude is fatal to the hypothesis that they are due to temperature variation as affecting instrumental measurements. Mr. Chandler finally gives a table of the dates of the maximum and minimum periods and amount of variation at Berlin for the next three years as a crucial test of his theory, and leads us to expect a further long period variation. If facts and figures count for anything, Mr. Chandler's confidence that future observations the "pitiless critic" of theory will only verify his predictions, should not be misplaced. W. G. T. NOTES. Comet Notes.--We learn from' Astronomical Journal...


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Product Details
  • ISBN-13: 9781231114537
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 352
  • Series Title: English
  • Weight: 630 gr
  • ISBN-10: 1231114533
  • Publisher Date: 01 May 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Spine Width: 19 mm
  • Width: 189 mm


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