Cailletet camera, circa 1877-1880. Gas liquefaction... - Lot 180 - Euvrard & Fabre

Cailletet camera, circa 1877-1880. Gas liquefaction apparatus Composed of a hydraulic pump (0-300 bars) in brass, a mercury tank on a tripod, a liquefaction tube with the cooling system and a manometer. The apparatus is made of solid brass, steel, wood and glass and bears Ducretet's signature on the dial and on the mechanism. Dim: handle length: 83 cm, height 90 cm, base: 65 cm x 55 cm (Recent restoration of the whole apparatus) It is attached Two large steel keys Currently there are 5 such apparatuses in France and this one is one of the most complete. On December 2, 1877, Louis Cailletet succeeded in liquefying oxygen for the first time. With the few drops obtained, this feat opened the way to liquefied gases, which Air Liquide has made its specialty. A gas is compressed to 300 bars, then expanded, which produces cold.