June 17, 1938. Washington, D.C. "No more hot air in Congress. Two million cubic feet of clean, cool air is delivered to members of Congress each minute by a $3,500,000 air conditioning plant, part of which is shown above. The plant supplies the entire Capitol and the Senate and the new and old House Office Buildings."
[Photo: Shorpy/Harris & Ewing]
Mick Hartley 
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