15 October 1884, Galveston Daily News, "The Wages of Women and Children" from the Chicago Herald, pg. 5, col. 5:
A custom tailor working as journeyman earns from $3 to $4 per day; a girl in a tailor-shop known as a sweat shop, earns little more than that per week.
29 July 1889, Weekly Courier-Journal (Louisville, KY), pg. 1, col. 6:
SWEAT SHOP SLAVES.
The Terrible Dens In Which Ready
Made Clothing Is Manufactured.
New York, July 26. -- A committee sent here by the Tailors' Union of Boston has been investigating the condition of the "sweating" shops, where ready-made clothing is manufactured, on the East side of this city.
26 July 1890, Frank Leslie's Illustrated Newspaper, pg. 529:
A SWEATING SHOP.
(East Side of New York -- ed.)
24 December 1890. Chicago Daily Tribune, p. 5
IN DARKEST NEW YORK:
Dreadful Places and Dreadful Things in the American Metroplis:
The Churchman: (...)
We must pass over his description of Jewtown and its sweat-shops, in which miserable Jews spend eighteen hours a day at slop-work for the clothing manufacturers, and from which clothing is often sent out leaded with the infection of small-pox and typhus.
4 February 1891. Indiana (PA) Messenger, pg. 1, col. 4 headline:
SWEAT SHOP EVILS.
Interesting Report of N.Y. Factory Inspectors.
5 July 1891, New York Times, pg. 9:
...east side sweating shops...
25 September 1891, New York Times, pg. 9:
...subrented to the storekeepers and to the operators of the "sweatshops."