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WALL MOUNTED MERCURY BAROMETER<br />
Measures Atmospheric Pressure<br />
Readings are taken by first adjusting the mercury level in the cistern to a zero point and then moving a vernier to the top of the mercury column.

Fphoto-60630503C-6RM.jpg

WALL MOUNTED MERCURY BAROMETER
Measures Atmospheric Pressure
Readings are taken by first adjusting the mercury level in the cistern to a zero point and then moving a vernier to the top of the mercury column.

Copyright:© 2005 Richard Megna - Fundamental Photographs

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Richard Megna