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Pittsburgh, Pennsylvania. (vicinity) Montour no. 4 mine of the Pittsburgh Coal Company. Testing for bad ceiling by sounding with the handle of a pick. If the slate is loose, it is pulled down till the ceiling becomes solid, or if it is very rotten, it is timbered
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Pittsburgh, Pennsylvania. (vicinity) Montour no. 4 mine of the Pittsburgh Coal Company. Testing for bad ceiling by sounding with the handle of a pick. If the slate is loose, it is pulled down till the ceiling becomes solid, or if it is very rotten, it is timbered

Collier, John, Jr., Collier, John · 1942-01-01 · photo, print, drawing

From the collection of Library of Congress. Free to download, adapt and use — no permission needed.

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safety film negativesunited statespennsylvaniaallegheny countypittsburgh
Credit linePittsburgh, Pennsylvania. (vicinity) Montour no. 4 mine of the Pittsburgh Coal Company. Testing for bad ceiling by sounding with the handle of a pick. If the slate is loose, it is pulled down till the. 1942-01-01. Collier, John, Jr., Collier, John. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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