Constant Volume Air Thermometer :- Consists of a polished teakwood stand approx. 750mm high fitted with a wooden scale reading from 0 to 60cm x 1mm & supporting an adjustable mercury reservoir by a metal rod. A detachable air thermometer bulb about 70mm diameter connected via three-way stopcock to mercury tube with zero index fused inside its upper end. A metal vessel surrounding the bulb supported by detachable metal shelf mounted on insulated asbestos screen. Mounted on a teakwood stand with a deep tray, which serves to catch.
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