Pittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Testing for gas with a safety lamp; of there is gas, the lamp will burn with a blue flame. The screening keeps the open flame confined but lets the gas in
Summary
Public domain photograph of Pennsylvania in 1930s, free to use, no copyright restrictions image - Picryl description
Tags
Date
01/01/1942
Contributors
Collier, John, 1913-1992, photographer
Location
Pittsburgh (Pa.), 40.44056, -79.99583
Source
Library of Congress
Copyright info
No known restrictions. For information, see U.S. Farm Security Administration/Office of War Information Black & White Photographs http://www.loc.gov/rr/print/res/071_fsab.html