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Start Over You searched for: Repository University of Pennsylvania: Kislak Center for Special Collections, Rare Books and Manuscripts Remove constraint Repository: University of Pennsylvania: Kislak Center for Special Collections, Rare Books and Manuscripts Subject Chemistry Remove constraint Subject: Chemistry Language French Remove constraint Language: French Year 1850 to 1899 Remove constraint Year: <span class="from" data-blrl-begin="1850">1850</span> to <span class="to" data-blrl-end="1899">1899</span>

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