1894.] NATURAL SCIENCES OF PHILADELPHIA. 481 



REPORT OF THE PROFESSOR OF LOWER INVER- 



TEBRATA. 



The Professor of Lower Invertebrata, respectfully reports that 

 during the past year he has delivered lectures on the results of the 

 Hawaiian Expedition. 



The additions to the museum during the year have been neither 

 numerous nor important. 



Work has been carried on in the carcinological department in re- 

 labelling and rearranging specimens. AVith the help of Dr. A. 

 Ortmann, the Porcellanidse have been correctly determined and re- 

 labelled. 



A course of lectures, ten in number, is planned to be delivered 

 wmetime during the spring on general zoology. 



Respectfully submitted, 



Benj. Sharp, 

 Professor of Loiver Invertebrata. 



REPORT OF THE PROFESSOR OF HISTOLOGY AND 

 MICROSCOPIC TECHNOLOGY. 



The Professor of Histology and Microscopic Technology respect- 

 fully reports that he has conducted less than the usual work in the 

 bacteriological laboratory than in past years, owing to the fact that 

 the greater part of his time has been devoted to his duties as Execu- 

 tive Curator. Some satisfactory work, however, has been accom- 

 plished in bacteriological examinations of drinking waters in the 

 State of Pennsylvania, and in continued investigations upon the 

 various lines heretofore suggested for the prevention and cure of 

 tuberculosis and other germ diseases. 



Original investigations made during the winter on the relation- 

 ship between Tuberculosis and Nitrogenous Metabolism have been 

 communicated to the Academy and published in the Therapeutic 

 Gazette for December 15, 1894. 



Microscopic examinations have been made of the viscera of 

 animals which have died at the Philadelphia Zoological Gardens. 



The bacteriological laboratory has been freely used by members of 

 the Academy who desired the privilege, while the society has not 

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