English Mechanic and World of Science Volume 55

English Mechanic and World of Science Volume 55

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1892 edition. Excerpt: ...at a constant rate by means of a conical pendulum-;'i"S as a train of wheel links, whilst a second train, driven by the fan, is always tending to force it down to the lower edge of the paper; its position, therefore, is governed by the relative difference in tie relocity of the two trains of wheelwork, being st zero when the air is calm; but at other times it records the rate-ai the fan in metres per second. The author-has made a comparison of this instrument with the Standard Auemometer at the Kew Observatory, and finds that it gives exceedingly good results. "Levels of the River Vaal at Kimberley, South Africa, with Remarks on the Rainfall of the Waterked," by Mr. W. B. Tripp, M.Inst.C.E., r-R.iIet.Soc Measurements of the height of the Bir Vaal have for several years past been made at the Kimberley Waterworks. These gauginga having sen placed at the disposal of the Society, the author ua compared them with the rainfall of the watertad There is a marked period of floods and Jactuations at a comparatively high level from about the end of October to the latter part of April, nd a period of quiescence, during which the river rteadily falls with very alight fluctuations from Jbwrt April 19th to October 31st. The highest nood, 52 oft., occurred in 1880, the next highest ing 50-3ft, on January 21th, 1801. QUEKETT MICROSCOPICAL CLUB. THE 302nd ordinary meeting of this club was held on Friday, May 20th, at 20, HanoverHo, W., Dr. W. H. Dailinger, F.R.S., president, lo the chair. Tne minutes of the preceding meeting were read nu confirmed. Three new members were elected, o4 the names of nine candidates for admission wets read and suspended until the next meeting. The additions to the library were announced; also...show more

Product details

  • Paperback | 1188 pages
  • 189 x 246 x 59mm | 2,068g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236989546
  • 9781236989543