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  1. By: Hartshorne, Henry
    Type: Article
    In: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge
    Volume: 19
    Issue: 107
    Date: 1880
    Page Range: 118--152
    Publication Info: Philadelphia, American Philosophical Society,
  2. By: Hartshorne, Henry
    Type: Article
    In: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge
    Volume: 12
    Issue: 81
    Date: 1871
    Page Range: 171--173
    Publication Info: Philadelphia, American Philosophical Society,
  3. By: Hartshorne, Henry
    Type: Article
    In: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge
    Volume: 16
    Issue: 97
    Date: 1876
    Page Range: 218--229
    Publication Info: Philadelphia, American Philosophical Society,