Maker's Name: 
Prouds Ltd., Electric Clock and Scientific Instrument Makers, 336 Kent St, Sydney
Where made: 
circa 1913
28 × 68 × 65 cm

A recording barometer designed by Thomas John Murday and built by Prouds Electric Clocks and Scientific Instruments in Sydney in the first quarter of the twentieth century.

The movement of an aneroid capsule is greatly magnified by a system of levers, and recorded on a paper roll using a thread recorder (rather than Murday's patented system).

The electric clock driving the chart recorder is to Murday's design. The intention was to be able to record pressure changes during storms. The device was probably used at the observatory in Perth, as it was collected at the tip there in the 1960s.

Microbarometer from UQ Physics Museum on Vimeo.

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