Well's natural philosophy : for the use of schools, academies and privte students, introducing the latest results of scientific discovery and research ; arranged with special reference to the practical application of physical science to the arts and the experiences of everyday life ; with three hundred and seventy-five engravings (1873)
Wells, David A · New York : Ivison, Blakeman, Taylor and Co. · leaf 176
g armof the tube is sustained by the pressure of the atmos-phere upon the surface of the mercury in the shorterarm, tlie end of which is open. A small float of ironor glass rests upon the mercury in the shorter arm ofthe tube, and is suspended by a slender thread, whichis passed round a wheel… … 172 WELLSS NATUKAL PHILOSOPHY. upon the open surflice, is raised or lowered in thetube, moving the index over a dial-plate, upon whichthe various changes of the weather are lettered. Fig. 160 represents the internal structure of thewheel-barometer, and Fig. 161 its external appear-ance, or casing,…
Physics · Science · Technology
Internet Archive · University of Toronto Libraries · Public Domain Mark 1.0. Free to use for anything.
