Natural philosophy. being a hand-book of chemical physics, or, The physics of heat, light and electricity (1869)
Sangster, John Herbert, 1831-1904 · Montreal : J. Lovell · leaf 31
pansion ofthe two metals causes the helix to coil more closely. Similarly,when it is subjected to a decreasing temperature, the unequalcontraction of the slips causes the helix to uncoil; and in eithercase the movement is measured by the number of degrees throughwhich the index passes. Note.—When… … PYROMETERS. 25 54. When hot water is suddenly poured upon a thick plate ofj;lass, or wlieu the liitmc of a lamp is directed against It, onesurface becomes hot and expands before the heat penetrates tothe other surface of the plate. As in the case of tlic compoundliar (if uu(al (Art. 52), we liave…
Physics
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