Индустриальная революция конца 19-начала 20 века в США сопровождалась массовым использованием детского труда.
The late 19th early 20th century industrial revolution in the U.S. was nasty and quite short for many very young working kids
Child laborers taking a break in 1880
Child labor 1911
Before child labor laws
East London, Spitalfields: children from 1912
Лондон, Ист-Энд, 1912 год.
http://historyloversclub.com/photos-of-child-labor/