Aneroid barometer

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“The aneroid barometer is an easily portable instrument, and avoids the use of any liquid. It consists of a circular metallic box, exhausted of air, the corrugated diaphragm of which is held in a state of tension by springs.” — Avery, 1895




Elroy M. Avery School Physics (New York: Sheldon and Company, 1895) 185


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