August 1940. Coaldale, Pennsylvania. "Baseball diamond for children with slagpile in background." Photo by Jack Delano, Office of War Information. View full size.

January 1943. "Production. Zinc. Cars for transporting zinc and lead ore. From the Eagle-Picher Mining & Smelting Co. plant near Cardin, Oklahoma, come great quantities of zinc and lead to serve many important purposes in the war effort." Photo by Fritz Henle for the Office of War Information. View full size.

November 1939. "Former tiff miner, now blind, with son. Washington County, Missouri. Photographs show mining and miners of tiff, form of white lead used in paint. A dangerous occupation because tiff mines are never timbered and all mining is done by hand labor from crude holes in ground usually 10 to 15 feet deep." Photo by Arthur Rothstein, Farm Security Administration. View full size.

        UPDATE: The historian Joe Manning has more on the life of Otha Porter Martin here.

October 1908. "Tipple boy at the Turkey Knob coal mine in Macdonald, West Virginia." Says the LOC: "Patron identifies this as her grandfather, Otha Porter Martin, born July 3, 1897." Photograph by Lewis Wickes Hine. View full size.

March 1940. "Old mine office. Virginia City, Nevada." Medium format negative by Arthur Frankenstein for the Farm Security Administration. View full size.

March 1940. "Corner of old mine office, abandoned mines in distance. Virginia City, Nevada." Photo by Arthur Rothstein for the FSA. View full size.

Bisbee, Arizona, circa 1905. "Czar Shaft and copper mining operations, Queen Hill." 8x10 inch dry plate glass negative, Detroit Publishing Co. View full size.

December 1941. "Factory workers' homes. Coatesville, Pennsylvania." Medium format negative by Arthur Rothstein, Office of War Information. View full size.

November 1942. "Production. Copper. Interior of large ball mill showing the iron balls which grind the ore to a fine size for subsequent treatment by flotation at one of the mills of the Utah Copper Company in Magna and Arthur." 4x5 nitrate negative by Andreas Feininger for the Office of War Information. View full size.

April 1939. Kilgore, Texas. "Oilfield workers eating lunch." 35mm nitrate negative by Russell Lee for the Farm Security Administration. View full size.

Circa 1910. "Coal loading at Ford Collieries, Allegheny County, Pennsylvania." 8x10 inch dry plate glass negative, Detroit Publishing Company. View full size.

"Coal miner during May 1939 strike. Kempton, West Virginia." 4x5 acetate negative by John Vachon for the Resettlement Administration. View full size.

November 1942. "Utah Copper -- Bingham Mine. Brakeman of an ore train at the open-pit mining operations of Utah Copper Company at Bingham Canyon, Utah." Photo by Andreas Feininger for the Office of War Information. View full size.

January 1911. Pittston, Pennsylvania. "Four Breaker Boys working in #9 Breaker, Hughestown Borough, Pennsylvania Coal Company. Boy on left is Tony Ross, 142 Panama Street. Other small boy is Mike Ross, cousin." Photo by Lewis Wickes Hine for the National Child Labor Committee. View full size.

November 1942. "Bingham Copper Mine, Utah. Carr Fork Canyon as seen from the 'G' Bridge." Kodachrome by Andreas Feininger for the office of War Information. View full size.