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  1. By: Mercer, Henry C
    Type: Article
    In: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge
    Volume: 36
    Issue: 154
    Date: 1897
    Page Range: 36--70
    Publication Info: Philadelphia, American Philosophical Society,
  2. By: Mercer, Henry C
    Type: Article
    In: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge
    Volume: 36
    Issue: 156
    Date: 1897
    Page Range: 424--433
    Publication Info: Philadelphia, American Philosophical Society,