Hydraulic pump liquifies CO2 gas in glass column.

Hydraulic pump liquifies CO2 gas in glass column. Carbon dioxide gas in a glass tube is compressed by a mercury column that is forced up when the handle on the hydraulic pump is operated. The glass tube is suspended in a water bath maintained at room temperature. At sufficient pressure, a layer of liquid carbon dioxide can be viewed by a close-up T.V. camera. Liquifaction Chamber in water bath at room temperature (22deg C), Handle Water Level. NOTE: For proper lighting for the T.V. camera, column is back-lit with a gooseneck lamp & paper screen. LIQUIFICATION OF A GAS.