AEROSTATICAL • FREE TRANSLATOR.ORG • Definition of Aerostatical

... the volume of an elastic chamber. The credit of the invention is usually given to Lucien Vidie, who patented his instrument in 1845, but similar instruments were in use much earlier. Thus in 1799 Nicolas Jacques Conte (1755-1805), director of the aerostatical school at Meudon, and a man of many parts—a chemist, mechanician and painter,—devised an instrument in which the lid of the metal chamber was supported by internal springs; this instrument was employed during the Egyptian ...

— Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3 - "Banks" to "Bassoon" • Various