Woman at work during World War I (between 1914 and 1918)
Photograph shows a woman seated at a cartridge venting machine at the U.S. Cartridge Co. plant in Lowell, Massachusetts, during World War I; her right arm is resting on a tray of empty cartridge casings, behind her, other women are operating cartridge venting machines.
The United States Cartridge Company was an early manufacturer of cartridge ammunition for small arms. The company was founded in 1869 by American Civil War general Benjamin Butler. Company startup was during the most rapid evolution of cartridge design to date. Lowell, Massachusetts emerged as one of the most successful cartridge producers in the United States while Butler served as a congressman from Massachusetts from 1867 to 1879 and as governor from 1883 to 1884. After supplying 65 percent of American small arms ammunition production for World War I, the company was acquired by the owner of Winchester Repeating Arms; and the Lowell factory closed as manufacturing shifted to New Haven, Connecticut. (From Wikipedia)