Negretti & Zambra - London. 'Admiral Fitzroy's Storm Barometer' - No. 1633. c1870 -
Good quality and unusual 19th Century mahogany-cased ‘Admiral Fitzroy’s Storm Barometer’ - No. 1633 – in original condition. The porcelain barometer plates bearing twin rack-and-pinion operated verniers for ‘Today’ and ‘Yesterday’, and signed by the makers. The inset mercury Fahrenheit thermometer also signed. The plates are protected by bevelled plate glass. The original concealed wide-bore barometer tube terminating in rectilinear cistern cover. Negretti & Zambra were the foremost Scientific Instrument makers of the latter 19th and early 20th Century, producing a large volume of precision instruments. This type of barometer were produced, at Fitzroy’s behest and at public expense, primarily for Life-boat Stations and fishing ports. As they were likely to be located out-of-doors they were assembled entirely using brass screws and without the use of glue.