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"The principal part of the aneroid barometer is a cylindrical air-tight box of metal closed by a corrugated top of thin elastic metal. The air is exhausted from the box, which is then sealed. Evidently, the pressure of the air on the outside of the cover will cause the cover to curve inwards, as the space inside of the cover is void of pressure, until the resistance due to the elasticity of the cover, aided by the resistance of a spring beneath it, is equal to the force exerted by the air." — Hallock, 1905

Aneroid Barometer

"The principal part of the aneroid barometer is a cylindrical air-tight box of metal closed by a corrugated…

This barometer depends upon the changes in form of a think metallic vessel partially exhausted of air, as the atmospheric pressure varies.

Aneroid Barometer

This barometer depends upon the changes in form of a think metallic vessel partially exhausted of air,…

The Aneroid Barometer is an instrument used in measuring atmospheric pressure. The aneroid barometer is circular and has a spindal for measurement.

Aneroid Barometer

The Aneroid Barometer is an instrument used in measuring atmospheric pressure. The aneroid barometer…

"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

Aneroid barometer

"The aneroid barometer is an easily portable instrument, and avoids the use of any liquid. It consists…

"This is an instrument shaped something like a small clock, and the barometric pressure is read by means of a hand or indicator, on a scale of inches placed on the face like the minute divisions of a clock." — Waldo, 1896

Aneroid Barometer

"This is an instrument shaped something like a small clock, and the barometric pressure is read by means…