Millikan, Robert Andrews, Gale, Henry Gordon · Boston : Ginn and Co. · leaf 45
PEESSURE IX AIR commoiily use an instrument called the aneroid barometer. It consistsessentially of an air-tight cylindrical box the top of which is a metallicdiaphragm which bends slightly under the influence of change in theatmospheric pressure. This motion of the top of the box is multipliedby a… … Fi. U. The aneroid barometer indicate a change in pressure when they are moved no farther than froma tal)le to the floor. In the self-recording aneroid barometer, or baro-graph, used by the United States \\eather Bureau (Fig. 29), several of theair-tight boxes are superposed for greater…
Physics
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