Title

Evangelista Torricelli inventing the mercury barometer

Caption

Evangelista Torricelli inventing the mercury barometer, 1643. [1873]. Torricelli (1608-1647) demonstrated that liquid will rise in a tube unless the weight of the column of liquid is equal to the pressure of the air pressing on an equal section of the reservoir of liquid. The height of a column will depend on the density of the liquid used. Thus a column of water would be 9.75m (32 feet), while that of mercury which is approximately 13.5 times denser, would be .736m (29 ins). From "The Atmosphere", by Camille Flammarion. (London 1873).

Info+

Photos12.com - Ann Ronan Picture Library

Credit line

Photo12/Ann Ronan Picture Library

Reference

ARP07104_460001198

License type

Rights managed

Available size

24,4Mb (3,1Mb) / 8,0in x 11,8in / 2408 x 3543 (300dpi)