Page:Popular Science Monthly Volume 12.djvu/635

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617
LIQUEFACTION OF GASES.
 
PSM V12 D635 Cailletet gas liquefaction apparatus.jpg
Fig. 1.—Cailletet’s Large Apparatus for Liquefying gases. A. Screw-press for compression; m fling-glass cylinder inclosing the glass tube in which the gas is liquefied.