Barometer Ist Empire carved gilded wood Torricelli system 19th century flower basket

Barometer according to Torricelli* in gilded carved wood, decorated on the pediment with a basket with wheat ears and laurel wreaths, as well as flowers, frame decorated with palmettes and foliage, from the First Empire period, early 19th century.
This barometer is in good overall condition, superb quality.
Please note: a few accidents and cracks in the wood and gilding, slightly stained and yellowed paper, age-related wear, see photos.
* Torricelli's barometer (1644):

The barometer was an invention developed by accident. Torricelli, Galileo's former secretary, was not directly interested in atmospheric pressure, but in fountain jets. Around 1643, Torricelli tried to solve a mystery: why do water columns rise no higher than 10 m? Torricelli decided to replace water with mercury, which is heavier than water and less voluminous because it is denser. He designed a glass tube filled with mercury, which he inverted over a basin of water, without letting any air inside. The amount of mercury needed to fill the 76 cm column reproduces the force exerted by a 10 m column of water. The force exerted by the air on the column slows its ascent, and it is impossible to fight against this force. He then realized that water cannot rise above 10 m for physical, not technological, reasons. In 1676, following Blaise Pascal's work on atmospheric pressure, the Académie des Sciences named this tube Torricelli's barometer, and named its unit of measurement the Torr (1 Torr = 1 mm on the mercury column).
(BNF website)
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Dimensions

Circle diameter 34.5 cm
Total height 93 cm / to pediment 88 cm / frame 58 cm
Width 51 cm

Catalogue number: F30 1257

All photos on :
www.antiques-delaval.com

Ref: UA9DDIA0FT