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Dun Echt Observatory Publications Volume 3

Dun Echt Observatory Publications 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. 1885 Excerpt: ...the difference of mean clock error found was--'Mr. F. Chambers--Mr. Harry Chintaman.... =+osx3 'The chronograph tapes had better be sent to you if you think they ought to be preserved let me know, please, if I should send them. 'Any points not mentioned above upon which you require information will, I think, be found to be explained in the tabular sheets. If I have omitted to mention any essential particulars kindly let me know, and believe me to be 'Yours sincerely, '(Signed) Chari.es Chambers, 'Superintendent Government Observatory. 'P.S.--The active direction of the operations at this end lay with Mr. F. Chambers, my own part being confined nearly to consultation. 'To David Gill, Esq.' Appended to the observations are the following remarks: --'The sidereal clock has a gridiron pendulum, and is somewhat over-compensated, but the temperature correction is not known. The approximate mean temperatures were--of Group I., 636; Group II., 73-i; and Group III., 68'5. 'The comparisons of the sidereal clock immediately after the transits show signs of irregularity of rate of the chronograph, or rather of the mean-time clock with which it was connected; but the full day's rates, as shown at the foot of the observations, were small and nearly equal--i.e. about six seconds--or the differences maybe attributed to irregularity in tapping the beats of the sidereal clock, but if so, the chronometer comparisons were remarkably free from the fault.' The Following Transit Observations Were Taken By Mr. Harry Chintaman, Those Of Polaris By Eye And Ear, And The Rest By Galvanic Chronograph (a Siemens' Ink-writer). 1875, yanuary 30.--The collimation error is observed by means of a collimator mark with micrometer movement, placed to northward of transit instrument; the angular v..


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Product Details
  • ISBN-13: 9781130405897
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 72
  • Spine Width: 4 mm
  • Width: 189 mm
  • ISBN-10: 1130405893
  • Publisher Date: 01 Mar 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 145 gr

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