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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Spencer, Guilford L. (Guilford Lawson), - Ewell, Ervin Edgar, - United States. Division of Chemistry.
    Publication info: Washington, D.C, G.P.O, 1892
    Holding Institution: Multiple institutions
    Subjects: Adulteration  Cacao  Coffee  Food adulteration and inspection  Tea