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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Nichols, Edward L
    Type: Article
    In: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge
    Volume: 55
    Issue: 220
    Date: 1916
    Page Range: 494--502
    Publication Info: Philadelphia, American Philosophical Society,
  2. By: Nichols, Edward L
    Type: Article
    In: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge
    Volume: 49
    Issue: 196
    Date: 1910
    Page Range: 267--280
    Publication Info: Philadelphia, American Philosophical Society,