Levy Mayer organized the Illinois Manufacturers’ Association and spearheaded the fight against the factory inspection law and Florence Kelley and her staff. A
In Ritchie v People (1895) the courts ruled in favor of an 8-hour working day limit for women employed in factories, workshops, and similar establishments. Although the Illinois Supreme Court struck down the ruling as unconstitutional, finally in Muller v. Oregon (1908), the U.S. Supreme Court upheld a law limiting women's working hours, relying heavily on evidence that long hours harmed women's health.
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| Levy Mayer, attorney (R) with Armour, J. Ogden. 1918 [Source: Harris & Ewing Library of Congress] |


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