Public domain
Fort Madison, Iowa. Apparatus for testing diesel cylinder heads for cracks in the diesel head shops of the Atchison, Topeka and Santa Fe Railroad. Water is forced into the head under pressure and with the aid of a small magnifying glass can be seen seeping out through any cracks
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineFort Madison, Iowa. Apparatus for testing diesel cylinder heads for cracks in the diesel head shops of the Atchison, Topeka and Santa Fe Railroad. Water is forced into the head under pressure and with. 1943-01-01. Delano, Jack. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.