Tag: French

Antique Pocket Hypsometers I - French Hypsometer
Aneroid, Barometers, Barometers in Action, Pressure, Technology, Testing Barometers, Vavasseur Antiques - Antique & Vintage Aneroid Barometers, Barographs & Other Scientific Instruments, Weather | April 12, 2023
Antique Pocket Hypsometers I – French Hypsometer
The term 'Hypsometer' is essentially applied to a device or system, perhaps mathematically based, that enables the determination of heights or elevations. It has been applied to aneroids and various trigonometrically based instruments. In this instance we are dealing with the instrument more generally recognised as a hypsometer, in essence a device not unlike a telescope however lacking lenses, the...
Harrison's Chronometer and the Determination of Longitude
History of Aneroid Barometers | October 29, 2017
Harrison’s Chronometer and the Determination of Longitude
The Science Museum recently posted a very interesting blog about the story behind John Harrison and his portrait at the Royal Observatory. In its own way, the invention of the aneroid barometer by Lucien Vidi and its determination of altitude was as significant an invention in the 19th century as Harrison’s was in the 18th. https://blog.sciencemuseum.org.uk/portrait-mr-harrison-timekeepers/