Monthly Notices of the Royal Astronomical Society Volume 53

Monthly Notices of the Royal Astronomical Society Volume 53

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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. 1893 edition. Excerpt: ... the observing catalogues, or had been imperfectly observed, and to the observation of stars which had been compared with comets. Several requests for accurate places of stars contained in the zone assigned to this observatory have been promptly met. The Northumberland Bquatoreal has been got into much better working order. The woodwork of the roof was much decayed, and has been replaced by sound material; so that the dome now revolves freely; the driving clock was put into the hands of a competent workman, and now carries the instrument round with comparative regularity. Under these improved conditions the telescope has been used much more frequently than during previous years. Preparation was made for observing the eclipse of the Moon on May ir, but clouds prevented observation. The weather was very unfavourable in November--we only got five nights with Holmes' Comet. In these we obtained thirtythree comparisons with adjacent stars, using the square-bar micrometer. The places of some of the stars have been observed with the transit circle. The Neivall Telescope, Cambridge Observatory. The Newall telescope (25 inches aperture) has been used for observation on 122 nights in the course of the year 1892. Some difficulty was experienced in the final adjustment of the instrument, and this was traced to the obliquity of the line of collimation to the declination axis. Alterations have been made, which have so far rednced the error that further trouble has not arisen. The new clockwork and gearing, constructed by Sir Howard Grubb, has just reached Cambridge (1893 January 2); and only the old inefficient clockwork has been available hitherto, so that observations involving the use of clockwork have been made at great disadvantage. Under these...
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Product details

  • Paperback | 120 pages
  • 189 x 246 x 6mm | 227g
  • Miami Fl, United States
  • English
  • Illustrations, black and white
  • 123653400X
  • 9781236534002