Smithsonian Report, 1896. 



Plate II. 



Laboratory Liquefaction Apparatus for the production of 

 Liquid Oxygen, etc. 



A, air or oxygen inlet; B, carbon dioxide inlet; C, carbon dioxide valve; 

 D, regenerator coils; F, air or oxygen expansion valve; G, vacuum vessel 

 with liquid oxygen; H, carbon dioxide and air outlet; O, air coil; #. carbon 

 dioxide coil. 



