Smithsonian Report, 1944.—Matthews PLATE 3 
1. INTERIOR OF AN R. A. F. DECOMPRESSION CHAMBER LOOKING IN FROM ONE 
OF THE GLASS PORTHOLES. 
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2 
2. R. A. F. MOBILE DECOMPRESSION CHAMBER. 
This is self-contained with an engine-driven pump, oxygen cylinders, and controls operated from the left: 
hand cab. 
