Cooke, Josiah Parsons, 1827-1894 · Boston, Little, Brown and Company · leaf 336
divisions become pro-portionally close together. The metallic manometer of Bourdon, based on the elasticity ofmetals, has been already described (104). (169.) Pneumatic Trough, — This simple contrivance, whichwe owe to Dr. c Priestley, for col- f lecting and trans- — ferring gases, isone of the… … 312 CHEMICAL PHYSICS. shelf is perforated with one or more holes, and its under surfaceis concave. When in use, the trough is filled with water to alevel which is one or two inches above the shelf. In order to col-lect a gas, a glass jar or bell is first filled with water, and thenplaced on the…
Matter · Heat
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