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Contents: Thomas Meehan, On the office of Bud-scales and Involucral Bracts; Joseph Leidy, M.D., Remarks on the Minerals of Mount Mica; Joseph Leidy, M.D., Remarks on Fossils from Oregon; Edward D. Cope, On the Fishes of the Ambyiacu River; Edward D. Cope, On a Species of Galeodes; Thomas Meehan, On the Seeds of Hamamelis Virginica; Thomas Meehan, On the Angular Divergence of the Branches of Plants; Joseph Leidy, M.D., Flies as a means of Communicating Contagious Diseases; Edward D. Cope, On the Fauna of the Wyandotte Cave; Edward D. Cope, On some Fossil Reptiles from Western Kansas; Theo. D. Rand, Notes on Feldspars and some other Minerals of Philadelphia and vicinity; Edward D. Cope, On Phrynosoma Ornatissima, Grd.; Joseph Leidy, M.D. Notice of some Worms; F.B. Meek, Descriptions of New Western Palaeozoic fossils mainly from the Cincinnati Group of the lower Silurian Series of Ohio. Reports of Librarian, the Curators, the Botanical Comm., the Recording Sec., Recorder of Microsopical and Biological Section, and the Conchological Section; Officer for 1872; Elections and correspondence during 1871; Donations to the Library; Proceedings of the Biological and Microscopical Dept. Illus.
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