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VINTAGRAPH • WPA • WWII • VINTAGE CHRISTMAS ART

The Sweet By and By: 1938

The Sweet By and By: 1938

July 1938. "Gashouse and graveyard. Dover, Delaware." Medium format negative by John Vachon for the Farm Security Administration. View full size.

 

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Raising the Pressure

This photo is the first that I've seen that shows how (concrete?) blocks have been added to the perimeter of the top course in order to raise the gas pressure. These gasometers, or gas holders, acted like an inverted tin can in a bowl of water. More weight on top would cause an increase of pressure of the gas inside. As the gas was consumed, the inverted "can" would ride the guide rails and slowly descend.

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