Illustration showing Air pump
Illustration showing Air pump. Fig 33 shows a typical pump with a rack-and-pinion mechanism for exhausting the bell. Fig 34 is a cross-section of the rack-and-pinion mechanism. 1820
Picture No
13912312
Media ID
48471926
Size
4062px x 5162px
(8.1MB)
Credit
World History Archive / Mary Evans Picture Library
Source
World History Archive





























