Report of the Board of Regents Volume 1918

Report of the Board of Regents Volume 1918

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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. 1902 edition. Excerpt: ...more simple and more sure; besides, at temperatures much over 1,000 C. the glaze on the porcelain tube of the pyrometer gives way, the furnace gases get into the wire and are absorbed, and the indications become untrustworthy. We hope it majr be possible to utilize the silica tubes, shown here by Mr. Shenstone a short time since, in a manner which will help us to overcome some of these difficulties. Here is another subject of investigation for which there is ample scope. So far we have discussed new work, but there is much to be done in extending a class of work which has gone on quietly and without much show for many years at the Kew Observatory. Thermometers and barometers, wind gauges and other meteorological apparatus, watches and chronometers, and many other instruments are tested there in great numbers, and the value of the work is undoubted. The competition among the best makers for the first place, the best watch of the year, is most striking, and affords ample testimony to the importance of the work. Work of this class we propose to extend. Thus, there is no place where pressure gauges or steam indicators can be tested. It is intended to take up this work, and for this purpose a mercury-pressure column is being erected. Bushy House, from basement to eaves, is about 55 feet in height. Wc hope to have a column of about 50 feet in height, giving a pressure of about 20 atmospheres; it is too little, but it is all we can do with our present building. The necessary pumps arc being fitted to give the pressure, and we shall have a lift set up along the column so that the observer can easily read the height of the mercury. This column will serve to graduate our standard gauges up to 20 atmospheres; above that we may for the present have recourse...show more

Product details

  • Paperback | 348 pages
  • 189 x 246 x 18mm | 621g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236584430
  • 9781236584434