Atmosphere : a philosophical work / by George Woodhead.

  • Woodhead, George.
Date:
1852
Catalogue details

Licence: Public Domain Mark

Credit: Atmosphere : a philosophical work / by George Woodhead. Source: Wellcome Collection.

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    produces, on many of them, no visible effect. This shows that the effects pro- duced by the burning-glass, which are placed. The drawing below shows the form of an air-pump. AN AIR-PUMP, WITH A RECEIVER ON ITS PLATE, READY FOR EXHAUSTION. o a is the receiver ; I is the hrass plate, which is generally- circular ; c is the tube connecting the cylinder with the brass plate; d is the cylinder; e is the valve in the cylinder ; h is the piston ; i is the valve in the piston. When the piston is forced down, the valve in the