Hydrometer Beaums

A glass tube of 6mm bore is enclosed in an enamelled and lacquered brass case, mounted on a polished wooden board with plates for fixing on wall. Open plate reflectors, ring and screws for vertical adjustments. A dual scale graduated in 25 to 32 inches and 640 to 810mm is read by verniers moving by rack and pinion, reading to 0.002 inch and 0.1mm are enclosed in a glass cylinder. A glass cistern at the lower end of barometer is provided with an ivory point to adjust the level of mercury. A thermometer -10 to 50C is provided on the wooden board. Supplied without mercury and glass case.

To demonstrate that when a liquid flows through a tube having a constriction, the speed of flow is increased and pressure decreased in the constricted section..

A horizontal tube 500 mm long 12mm O.D. is constricted near its centre and short side tubes are provided in each section for attaching glass manometer tubes 270 x 8 mm bore. If a constant head device is used to send a flow of water through the horizontal tube the variation of pressure in various sections may be determined.