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By: Cresson, Hilborne T. (Hilborne Thomson),Type: ArticleIn: Proceedings of the Academy of Natural Sciences of PhiladelphiaVolume: 35Series:Issue:Date: 1883Page Range: 43--44Publication Info: Philadelphia, Academy of Natural Sciences of Philadelphia,Subjects:
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By: Cresson, Hilborne T. (Hilborne Thomson),Type: ArticleIn: Proceedings of the Academy of Natural Sciences of PhiladelphiaVolume: 35Series:Issue:Date: 1883Page Range: 55--56Publication Info: Philadelphia, Academy of Natural Sciences of Philadelphia,Subjects: