Astronomical and Meteorological Observations Made at the Radcliffe Observatory, Oxford; In the Year

Astronomical and Meteorological Observations Made at the Radcliffe Observatory, Oxford; In the Year

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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. 1866 edition. Excerpt: ...passing the Meridian" given in that work. The large positive tabular errors observable in the results are mostly (except in the early part of the year) those observed by Mr. Lucas, and by them it would appear that his estimation of the time of transit of the first limb over the wires is different from that of the second limb. For cases in which only one limb has been observed, the Nautical Almanac value of the " Time of Transit of Semidiameter" has been adopted without alteration. The same explanation will suffice for the vertical diameters of the sun, excepting that these are corrected for refraction. The mean of seventy-three values of the error of the Nautical Almanac semidiameter is 4-1"-oj. For the moon a correction is applied if necessary to the transit of that limb which is defective on account of imperfect illumination (computed in the usual way), and the difference of the transits of the two limbs is then compared with that found by doubling the value given in the Nautical Almanac in the Section of Moon-Culminating Stars, corrected if necessary for difference of longitude. The mean of three values of the error of the tabular duration of passage of semidiameter is ]0" 11. The error of the tabular vertical diameter as deduced from only one observation is + 5"'64. The comparisons of the observed and tabular values of the diameters of the other planets need no explanation, excepting that those for Mercury, Venus, and Mars have been corrected for defect of illumination. The application of the tabular errors of tbe diameters of the planet Venus to determine the correction to be applied in 1863 has been already given (p. xxvi). Right Ascensions and North Polar Distances.--The Mean Solar Times are computed by means...show more

Product details

  • Paperback | 26 pages
  • 189 x 246 x 1mm | 68g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236487583
  • 9781236487582