Bunting v. Oregon
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In Muller v. Oregon (1908), the Court upheld a ten-hour law for women, largely based on the sociological data that attorney Louis D. Brandeis presented regarding the adverse effects of long hours on the health and morals of women. The trials of Bunting v. Oregon, nine years later (in 1917), resulted in acceptance of a ten-hour workday for both men and women, but the state minimum-wage laws weren't changed until twenty years later.
Shi, David E., George Brown Tindall (2004). America - A Narrative History, Brief, 6th., Norton. ISBN 0-393-97813-3.