Smithsonian Report, 1936. — Guillien 



Plate 3 



1. Room for the Production of Liquid Air. 

 On the left, compressor; on the right, apparatus in which a part of the air is e.xpanded, and hquefier. 



2. Room for liquefaction of Hydrogen. 



"On the left and at the center, compressors; on the right, liquefier and receptacles for transporting the liquid 



hydrogen. 



