A Companion to the Mountain Barometer
by
Thomas Jones
Book Details
Format
Paperback / Softback
Book Series
Cambridge Library Collection - Earth Science
ISBN-10
1108049370
ISBN-13
9781108049375
Publisher
Cambridge University Press
Imprint
Cambridge University Press
Country of Manufacture
GB
Country of Publication
GB
Publication Date
May 17th, 2012
Print length
48 Pages
Weight
74 grams
Dimensions
13.90 x 21.60 x 0.60 cms
Product Classification:
History of science
Ksh 2,750.00
Manufactured on Demand
0 in stock
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Quality
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When he published this book in 1817, Thomas Jones had made and sold about three hundred Englefield mountain barometers. Made to measure air pressure, the barometers could be used to calculate the altitude of mountains and the depths of mines, with the help of the logarithm tables Jones provides in this book.
The Englefield mountain barometer was designed to calculate altitude and was so easy to use that a reading could be taken out of the window of a carriage – provided the horses stood still. Using a bar of mercury, which fell in the lower air pressure of higher altitudes, the barometer gave readings accurate to one thousandth of an inch. By taking a mercury reading at two locations, the owner could work out the difference in altitude between them. In this companion book, first published in 1817, the maker of the new barometer, Thomas Jones, provides tables listing the heights of objects measuring between fifteen and thirty-one inches of mercury. These measurements account for the heights of all mountains in England. He also includes tables that show how to allow for the expansion of both air and mercury. A fascinating book for historical researchers and experimenters in physics alike.
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