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Memoirs of the British Astronomical Association Volume 7-9; Reports of the Observing Sections: (English)

Memoirs of the British Astronomical Association Volume 7-9; Reports of the Observing Sections: (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. 1899 Excerpt: ...and the meteor passed 'left' of K Cephei," not " East." X3 Introduction. The present Report is mainly due to the energy and devoted industry of Miss Brown, the late Director of the Section. Almost the whole of the sheets for the Calendar and for the Ledger had been drawn up at the time of her death. The work of the present Director has been chiefly confined to a careful revision of the manuscript. In this work the proof sheets for 1898, of the invaluable series of Greenwich measures of the positions and areas of sun-spots, courteously supplied by Mr. Maunder, and the series of Stonyhurst drawings of the solar surfacej have been of very great assistance. By this means the comparatively few gaps in the continuity of the record for the year which existed have been filled up. The total number of groups recorded in 1898 was only 9i, and the days on which no spots were seen amounted to 38. The following table, prepared by aid of the reports so far published, exhibits the rise and fall in the number of groups observed each year, and the corresponding decrease and increase of the days on which no spots were seen on the visible solar disk during the last eight years. It will be noted that the rise to the maximum number of groups in the year 1893, from the year 1891, was somewhat more rapid than the decline from 1893 to 1897. The fourth column in the table gives the number of days each year on which no record appear in the reports: --The records for the year 1891 were filled up by the aid of the Greenwich volume, as stated in the Report for that year. During the period from March 28, 1891, to April 14, 1896, or for more than five years, the observations published in these reports show that there was no day on which the sun was free from spots. Of...


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Product Details
  • ISBN-13: 9781130544602
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 86
  • Series Title: English
  • Weight: 168 gr
  • ISBN-10: 1130544605
  • Publisher Date: 01 Mar 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Spine Width: 5 mm
  • Width: 189 mm

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