Author : Stevens Institute of Technology
Publisher :
ISBN 13 : 9781330503478
Total Pages : 364 pages
Book Rating : 4.5/5 (34 download)
Book Synopsis Stevens Indicator, Vol. 8 (Classic Reprint) by : Stevens Institute of Technology
Download or read book Stevens Indicator, Vol. 8 (Classic Reprint) written by Stevens Institute of Technology and published by . This book was released on 2015-06-30 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Stevens Indicator, Vol. 8 At the present time the extremely high temperature used in the arts, such as in blast furnaces, potteries, etc., necessitates more accurate knowledge of the degrees of temperature of a furnace, but the known methods do not seem to give sufficient precision. Synopsis Of The More Familiar Methods. In 1701 Newton gave some results to estimate the temperature of red-hot iron by noting the time it required to cool to an observed temperature, assuming his law of cooling. At about the same time an experiment was made in Paris, in which the temperature of a red-hot bar of iron was determined by means of a rude air thermometer, the first of its kind, in which variations of atmospheric pressure were allowed for. The Expansion of Liquids is the most favored form, but is adapted to low temperatures only. The Expansion of Solids. - The best form of this kind of pyrometer is that devised by Daniel!. It consists of a prismatic bar of platinum placed in a prism of plumbago. Upon the platinum bar rests the lever arm of a recording device. The apparatus is placed in melting ice. and the position of the pointer noted. It is then placed in the furnace, and when the platinum reaches a constant temperature a reading is taken. The temperature is calculated from the established laws of linear expansion of platinum. This form can be used where only rough approximations are desired, as it is not suitable for delicate determinations. Contraction of Baked Clay. - This method was devised by Wedgewood, to determine the temperature of his pottery kilns. He noticed that when clay is baked it contracts considerably, the amount of contraction increasing with the temperature. On this principle he based the construction of his pyrometer. He made cylinders of clay, all having the same diameter. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
