The Short & Mason barograph mechanism overall of fine lacquered brass construction. Conventional 8-day drum recorder, bearing “Pat. No. 3715.02” to top plate and serial no. “55595” to lower plate, with good quality platform escapement, captive winding key and top cover. The whole mounted on a conical base with static top mounted sun gear, serial no. “5595.” The barometer set on separate, unsigned chassis with fluted border and raised on four turned brass supporting pillars, seven capsule pressure sensing set with adjustment wheel over, having well-engineered connecting mechanism and driving delicately executed, white metal arm and blued indicator to barometric scale. Base-mounted arrester bar with single stop pin. Silvered and engraved brass open-faced 4½” dial with conventional annotation calibrated from 28-31 inches of mercury, bearing registered design no. “428606” and maker’s name “Short & Mason Ltd, London” to bottom. Conventional corked ink bottle with dipper, inset to cabinet base. The whole contained within its original lacquered oak case with lift-off cover of heavy bevelled five-glass construction. Frieze drawer to bottom for charts.
The instrument, its cabinet disassembled, cleaned and polished, the mechanism cleaned and serviced, remains entirely original in all respects. The recording paper for an up-to-date test shows good sensitivity and function. The test trace shows the steep drop in pressure caused by the snow storm here in Shropshire over the weekend.
Instruments with this combination of barograph and aneroid barometer may be considered scarce. The majority found as untouched require re-lacquering to the case due to sun damage. This Short & Mason barograph is particularly unusual in that the mechanism and its oak case are in such good original condition. It has restored very well.
Dimensions: 14″ wide x 9″ high x 8½” deep
Stock No: BG0434