Published in Proceedings of The American Philosophical Society, in 1884, in volume 21, issue 115, pages 345-412

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Published in Proceedings of The American Philosophical Society, in 1884, in volume 21, issue 116, pages 572-590

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Published in Proceedings of The American Philosophical Society, in 1884, in volume 21, issue 116, pages 616-651

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Published in Proceedings of The American Philosophical Society, in 1884, in volume 21, issue 116, pages 705-706