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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Spitzka, Edw Anthony
    Type: Article
    In: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge
    Volume: 47
    Issue: 188
    Date: 1908
    Page Range: 39--50
    Publication Info: Philadelphia, American Philosophical Society,
  2. By: Spitzka, Edw Anthony
    Type: Article
    In: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge
    Volume: 47
    Issue: 188
    Date: 1908
    Page Range: 51--58
    Publication Info: Philadelphia, American Philosophical Society,