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* Monthly Notices of the Royal Astronomical Society. Vol. LX, Nos.8-10. 
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* Nachrichten von der kònigl. Gesellschaft der Wissenschaften zu Gottingen. 
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* Natuurkundig Tijdschrift voor Nederlandsch-Indié utigegeven door de 
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* Proceedings of the Asiatic Society of Bengal. Nos II-VIII (1900). Cal-_ 
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* Proceedings (The Scientific) of the R. Dublin Society. Vol. IX (N. S.), 
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* Proceedings (The Economic) of the R. Dublin Society. Vol. I, 1899. 
Part I. Dublin, 1899; 8°. 
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* Proceedings of the Royal Society. Vol. LXVI. Nos. 431-434; LXVII, 
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* Proceedings of the Zoological Society of London for the year 1900. 
Part II, III. London, 1900; 8°. 
* Proceedings of the American Philosophical Society held at Philadelphia. 
Vol. XXXVIII. No. 160; XXXIX, 161. Philadelphia, 1899; 8°. 
