22 proceedings of the academy of [feb., 



February 7. 

 The President, Samuel G. Dixon, M.D., LL.D., in the Chair. 



Forty-five persons present. 



The receipt of papers under the following titles was reported : 

 "New Cycads and Conifers from the Trias of Pennsylvania." by 



Amos P. Brown (January 18). 



"The Ethno-Botany of the Gosiute Indians," by Ralph V. Chamber- 



lin (February 6). 



The deaths of Frank Haseltine, July 18, 1910, and of William T 

 Biddle, August 11, 1910, members, were announced. 



The meeting was held in conjunction with the Biological and Micro- 

 scopical Section. 



Mr. Frank J. Keeley gave a summary of the work accomplished 

 by means of the micro-spectroscope. (See paper.) 



Dr. Herbert Fox exhibited specimens of sputum showing the 

 human type of tubercle bacilli, section of a lung of a guinea-pig showing 

 bovine bacilli in a histologic tubercle', an avian tuberculoma with 

 tubercle bacilli in the epithelioid cells, the Trypanosoma lewisi in the 

 blood of a rat, and two forms of the malaria of birds, Proteosoma and 

 Halteridium, showing their relations to the nucleus of the red blood-cell. 

 The first three sections were from the Laboratory of the Pennsylvania 

 Department of Health, the last three from the Laboratory of Com- 

 parative Pathology of the Philadelphia Zoological Society. 



Mr. W. H. Van Sickle spoke of carniverous plants, with illustrative 

 specimens. (No abstract.) 



Mr. Hugo Bilgram referred to the moulting of caterpillars involving 

 the duplication of organs and called attention to illustrative prepara- 

 tions. ^ 



Mr. Charles S. Boyer exhibited sections of Selenite and Leucite. 



Dr. D. E. Owen showed specimens of Ishnia nervosa, a diatom 

 from the coast of Maine, not before reported from that locality. 



Dr. Thomas S. Stewart exhibited preparations of the blood of a 

 leucsemic patient, the fly and larva of the Congo blood-sucker, and 

 specimens of hydroids. 



