This photograph and others by photographer and social reformer Lewis Wickes Hine led to outrage over child-labor practices in America—and eventually to reforms. This particular shot was taken in Bib Mill No. 1, Macon, Georgia, in 1909. Of this photo Hine said, “Some boys were so small they had to climb up on the spinning frame to mend the broken threads and put back the empty bobbins.”

Prints and Photographs Division, Library of Congress