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. "Los Angeles & San Diego Beach Railway -- Gasoline motor car running from San Diego to La Jolla, California." A McKeen Motor Car at the Hotel Cabrillo in La Jolla. 5x7 glass negative, Detroit Publishing Co. View full size.

September 1942. Rochester, New York. "Earl Babcock's mother helping with his bath." Photo by Ralph Amdursky, Office of War Information. View full size.

San Francisco, 1926. "Paige sedan -- Great Highway." The perambulating Paige last spied here. 5x7 glass negative by Christopher Helin. View full size.

Washington, D.C., or vicinity circa 1925. "Children" is all it says here. National Photo Company Collection glass negative. View full size.

New York circa 1911. "Fifth Avenue at West 43rd Street." 5x7 inch dry plate glass negative, Detroit Publishing Company. View full size.

"Armstrong, Master. Between February 1894 and February 1901." 5x7 glass negative from the C.M. Bell portrait studio in Washington, D.C. View full size.

Colorado Springs circa 1910. "Exchange National Bank Building, Tejon Street." 5x7 inch dry plate glass negative by William Henry Jackson. View full size.

Palm Beach, Florida, circa 1906. "Watching the boat races. Whitehall [Henry Flagler mansion] in background." 5x7 inch glass negative. 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.

February 1917. "Horace Lindfors, 14-year-old printer's helper, sizing up leads for Riverside Press, First Avenue, New York City." 5x7 inch glass negative by Lewis Wickes Hine for the National Child Labor Committee. View full size.

February 2, 1917. "Girls working at mangle in Bonanno Laundry, 12 Foster Wharf, Boston. All are 15 years old and go to continuation school." 5x7 glass negative by Lewis Wickes Hine for the National Child Labor Committee. View full size.

February 1917. New York. "Louis Gitney, a young compositor earning $7 a week in a Sixth Avenue (N.Y.) printing office. He learned the trade at Public School 64." 5x7 inch glass negative by Lewis Wickes Hine. View full size.

Circa 1903. "Government Street -- Victoria, British Columbia." 8x10 inch dry plate glass negative, Detroit Publishing Company. View full size.