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  1. By: Houston, Edwin J. (Edwin James), - Thomson, Elihu,
    Type: Article
    In: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge
    Volume: 18
    Issue: 102
    Date: 1878
    Page Range: 58--61
    Publication Info: Philadelphia, American Philosophical Society,
  2. By: Thomson, Elihu,
    Type: Article
    In: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge
    Volume: 46
    Issue: 185
    Date: 1907
    Page Range: 124--137
    Publication Info: Philadelphia, American Philosophical Society,