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Proceedings of the Academy of Natural Sciences of Philadelphia. P. II. Oect.—Dee. 1889. 
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Transactions of the New York Academy of Sciences. 1889/90. Vol. IX. N.1.2. New York. 
Annals of the New York Academy of Sciences late Lyceum of Natural History. Vol. V. 
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Transactions of the American Philosophical Society held at Philadelphia, for promoting useful 
Knowledge. Vol. XVI. New Series. P. III. Philadelphia 1890. 4. 
The American Naturalist. Vol. XXIII. N. 274.275. XXIV. N. 279— 281. Philadelphia 
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Journal of the American Oriental Society. Vol. XIV. New Haven 1890. 
The American Journal of Science. Ser. Il. Vol. XXXIX. N. 232 —234. 1890. New 
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Annals of the Asironomical Observatory of Harvard College. Vol. XVII. N.X. Vol. XXI. 
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Memoirs of the Museum of Comparative Zoology, at Harvard College. Vol. XVI. N. 3. 
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Bulletin of the Museum of comparative Zoology, at Harvard College. Vol. XVI. N.7.8. 
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American Philologieal Journal. Vol. XI. N.6.7. Baltimore 1889. 
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Transactions of the American Philologieal Association. 1889. Vol. XX. Boston. 
The Technology Quarterly. The Massachusetts Institute of Technology. Vol. III. 1890. N. 1. 
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The Iowa Weather Service assaulted Iyy the Iowa University and the Signal Service. By 
G. Hınrıcas. St. Louis 1890. 
Henry Draper Memorial. Fourth annual report of the photographie study of Stellar 
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