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ANEROID BAROMETER DIAL<br />
The dial range is 28 to 31 which is equivalent to the # of inches of Hg supported in a column by atm. pressure. Behind this dial is a metal box nearly evacuated with a fluted lid that is flexible. Variations of pressure on lid push levers & move needle.

Fphoto-28419101A-6PS.jpg

ANEROID BAROMETER DIAL
The dial range is 28 to 31 which is equivalent to the # of inches of Hg supported in a column by atm. pressure. Behind this dial is a metal box nearly evacuated with a fluted lid that is flexible. Variations of pressure on lid push levers & move needle.

Copyright:© 1991 Paul Silverman - Fundamental Photographs

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Paul Silverman