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By: Nichols, Edward LType: ArticleIn: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledgeVolume: 55Series:Issue: 220Date: 1916Page Range: 494--502Publication Info: Philadelphia, American Philosophical Society,Subjects:
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By: Nichols, Edward LType: ArticleIn: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledgeVolume: 49Series:Issue: 196Date: 1910Page Range: 267--280Publication Info: Philadelphia, American Philosophical Society,Subjects: