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Antique Mahogany Negretti & Zambra London Barograph With Thermometer : Working
£695 $934 €803
This is a wonderful quality antique barograph which was made by the highly renowned NEGRETTI & ZAMBRA, LONDON and has the rear feature of a thermometer. The case is made from mahogany and has lovely deep bevelled glass to all four sides and the top. The jewelled movement is 8 day which and is complete with it''s winding key which is integral with the movement. The barograph is engraved on the base plate ''NEGRETTI & ZAMBRA LONDON ''. Then the movement bras the NEGRETTI & ZAMBRA symbol and ''529'', ''446'' and ''7D''
NEGRETTI & ZAMBRA, LONDON was founded in 1850 when Henry Negretti and Joseph Warren Zambra formed a partnership; the firm would eventually be appointed optical instrument makers to Prince Albert, the Royal Observatory and the British Admiralty. The Company later gained patents to improve on the design and construction of its instruments, and in 1851 gained a patent to make thermometers. 1851 The partners were the only English instrument makers to receive a prize medal fo...r meteorological instruments at the 1851 Great Exhibition. They were appointed instrument makers to the Queen, Greenwich Observatory, and the British Meteorological Society
The barograph takes barometric measurements which in turn are recorded on a paper record sheet which is mounted on a clockwork revolving cylinder, the ink nib draws a line on the chart as the pressure rises and falls. The cylinder makes one full revolution in one week. This barograph also has the rare feature of a thermometer.
The barograph and barometer are in full working order. Although not part of the sale, the barograph comes complete with spare charts and ink.
To wind the barograph firstly the lid is taken of, then the locking nut is taken off which allows the barrel to be lifted off. The winder can then be seen and as such can be wound.
The approximate dimensions are:
- 14 1/4 inches (36 cm) long
- 8 3/4 inches (22 cm) deep.
- 8 1/2 inches (21.5 cm) high.
As you can see from these dimensions the barometer is of fantastic proportions.
CONDITION:
The barograph is in excellent condition and is in full working order. The case and glass are also in excellent condition as can be seen in the photographs just minor marks commensurate with age and use and just some age related marks to the brass. Please study photographs carefully as they form part of the description and condition, as what you view is exactly what you will receive.
ref : barograph a55
Internal Reference: Barograph a55
Antique ID Number (AIDN): SA1192508
Dateline of this antique is 19th Century
Antique SA1192508 shown on this page was made in the 19th Century. For historical context, the timeline below highlights the period when it was created:
19th Century
ANTIQUE SA1192508
CONTACT DETAILS OF SELLER:
N Wilson Antiques Clocks
Cheshire
United Kingdom
Tel: 07704 152890
EMAIL SELLER
Send direct to seller
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