Photographs by Lewis W. Hine of child labor in the United States (1908-1912). His efforts are widely recognized as the first use of photography to bring about legislative change. He exposed the conditions under which they worked. For example in the fourth pic from the bottom: the 8-year old girl is "running home from the factory all alone, her hand and arm bathed with blood, crying at the top of her voice. She had cut the end of her thumb nearly off, cutting sardines in the factory, and was sent home alone, her mother being busy. The loss of blood was considerable, and might have been serious."