June, 1847.] 219 



Les Pigeons ; par Madame Knip, nee Pauline de Courcelles, 

 premies peintre d'histoire naturelle de S. M. l'lmpera- 

 trice Reine Marie Louise : le texte (ler. tome) par C. J. 

 Temminck, et (2e. tome) Florent Prevost. Folio. Paris, 

 1811, 1834. 



A letter was read from the Royal Bavarian Academy of 

 Sciences, dated Munich, April 26, 1847, requesting certain 

 portions of the publications of this Society for completing 

 the series of the same in the Bavarian Academy. 



A communication was read from the Secretary of the 

 American Philosophical Society, dated May 7, 1847, return- 

 ing acknowledgments for late numbers of the Academy's 

 Proceedings. 



Professor Hare read a memoir intended for publication in 

 the Journal of the Academy, entitled " Objections to the 

 electrical theories of Franklin, Du Faye and Ampere, with 

 some suggestions as a substitute." 



Referred to a committee consisting of Dr. Bridges, Mr. H. 

 Seybert, and Prof. Johnson. 



Professor Hare stated that among the results of the com- 

 bustion of gunpowder, he had detected the formation of Sul- 

 pho-cyanide of Potassium, indicated by its producing a blood- 

 red precipitate with the per-salts of iron. 



Stated Meeting, June 22d, 1847. 

 Vice President Morton in the Chair. 



DONATIONS TO MUSEUM. 



A collection, in spirits, of Reptiles from Jamaica. Presented 

 by Dr. C. W. Pennock. 



Dr. C. D. Meigs presented a living specimen of Hydrochoerus 

 capybara (Cavy,) from South America, and a living speci- 

 men of Didelphis Virginiana. 



