Progress of Astronomy Volume 3

Progress of Astronomy Volume 3

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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. 1881 edition. Excerpt: ...and Geodetic Survey. The weather was in general pleasant, though there was one severe rain-storm, and nearly every day there were flying clouds with slight showers, as is not unusual in the region of the trade-winds. The wind was usually strong, and blew bteadily from a direction varying from north to east, but never south of east, though the island is in the heart of the southeast trade region. Eight inches of rain fell during the seventeen days which the party spent on the island, more than half of this in one storm on May 4. The weather on the morning of May 6 was cloudy and threatening, but after several showers the sky cleared shortly before the time of first contact, and remained clear the remainder of the day, with rapidly moving clouds. One of these partially concealed the corona for about twenty seconds in the first minute of totality, and the sun was wholly in a cloud soon after the close of totality; but the observations were not interfered with, though there was at all times baze in the atmosphere. The observations planned were carried out successfully, with results which will be given in full detail in the official report of the expedition. A summary of these results can, however, be given at the present time. Professor Holden swept for intra-mercurial planets, but none existed in the region examined. Spectroscopic observations were made by Dr. Hastings and Messrs. Rockwell, Brown, aud Upton, with interesting results. Dr. Hastings had devised a spectroscope by which the spectra of two opposite sides of the sun were brought into juxtaposition, and could be examined simultaneously. This instrument, which was attached to a 6J-inch equatorial, was used especially to note the changes in the appearance of the 1474 line on the preceding and...show more

Product details

  • Paperback | 222 pages
  • 189 x 246 x 12mm | 404g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236613406
  • 9781236613400