Air Thermometer, Constant Volume

The apparatus consists of detachable air thermometer bulb of about 40mm diameter, connected to mercury tube with zero index through a three-way stopcock. Reservoir tube sliding on vertical support rod with clamp along side scale graduated 0 to 500 x 1mm. A copper vessel, about 100 x 75mm in size, surrounds the bulb and is supported on top of a detachable shelf with thermally insulating screen towards the stand. Complete assembly mounted on a polished wooden stand with base in the form of a small tray for mercury. All glass parts of Borosilicate glass. Complete with pressure rubber tubing and copper vessel.