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meyer; the Geographical, Anthropological, Antiquarian and 
Medical Societies of Paris; Annales des Mines and Revue 
Politique ; the Geographical, Physical and Linnean Societies 
at Bordeaux; the Royal Institution, Zoological, Geographi- 
cal and Astronomical Societies in London; Journal of For- 
estry and Nature; the Canadian Naturalist; Cambridge 
M. C. Z.; Boston N. H.S: Appalachian Club; Massachu- 
setts Board of Health; Silliman’s Journal; Franklin Insti- 
tute, Journal of Pharmacy, Medical News, Penn Monthly; 
Historical Society, Pa.; Geological Survey, Pa.; Judge 
Kelly ; 8S. H. Scudder; U.S. Fish Commissioners ; Wiscon- 
sin N. H. Association ; Botanical Gazette ; Min. de Fomento 
of Mexico; and the Cicinnati N. H. Society. 
The Librarian displayed a set of 21 colored plaster casts, 
or imitations of original Archeelogical American specimens, 
in Prof. Guyot’s Museum at Princeton College, N. J., made 
by Prof. Matile, and presented to the Cabinet of the Ameri- 
can Philosophical Society, by Prof. Guyot, as a return for 
the permitted copy of many of the antiquities in the Cabi- 
net, for the use of the Museum at Princeton. On motion it 
was resolved that the thanks of the Society be tendered to 
Prof. Guyot and Prof. Matile for this beautiful addition to 
the Society’s collections. 
The Librarian reported that Part ILI of the Catalogue was 
printed and ready for distribution; including Class VI, 
Sociology, Manufactures, Commerce, War and Law ; making 
a volume of 300 pages, bringing the running folio up to 
page 942. On motion the distribution was ordered. 
The decease of Mr. Wm. M. Gabb, at Philadelphia, May 
30th, aged 39, was announced with appropriate remarks by Dr. 
Horn, who, on motion, was appointed to prepare an obituary 
notice of the deceased. ; 
Prof. Chase communicated a paper, entitled “On rotation 
and radiation.” 
Dr. Weir Mitchell, communicated a paper, entitled “‘ The 
effect of Irrelation of a polarized nerve, Pfliiger’s Electri- 
