1901.] NATUEAL SCIENCES OF PHILADELPHIA. 769 



REPORT OF THE BIOLOGICAL AND MICROSCOPICAL 



SECTION. 



The Section has held the usual meetings during the year with 

 increased membership. It has lost by death a valued member, 

 Mr. David S. Holman. 



The Conservator reports that the apparatus and slides belonging 

 to the Section are in fair condition, and some progress has been 

 made in cataloguing the latter. 



Additions during the year include thirty-six slides of wood sec- 

 tions purchased and twenty-six volumes, principally of microscopi- 

 cal journals, presented by Mr. Jo';n C, AVilson. 



At a joint meeting with the Biological Society of the Univer- 

 sity of Pennsylvania, the latter was represented by Prof. Conkliu, 

 who spoke upon " Fertilization and Inheritance," and the Section 

 by Mr. Frank J. Keeley, who gave a history of the " Develop- 

 ment of the American Microscope." Dr. Morris also spoke upon 

 the " Theory of Vibration." 



Communications have been made by Mr. Palmer on Spirogyra 

 and desmids; by Mr. Keeley on rock-inclusions, various appliances 

 of the microscope, and the Abbe diffraction theory; by Mr. Wool- 

 man on artesian well deposits, by Mr Boyer on diatoms; by Dr. 

 Stewart on white blood corpuscles and bacteria, and by Dr. Morris 

 on pathology. 



At the meetings with the Academy Dr. Benjamin Sharp spoke 

 upon the " Food of the Cod;" Dr. Pilsbry on the " Relationships 

 of the Genus Neobeliscus ;" Mr. Keeley on the "Structure of 

 Diatoms" and "Colored Illumination," and Drs. Ravenel and 

 McCarthy on the ' ' Pathology and Treatment of Rabies. ' ' 



The following officers were elected for the ensuing year: 



Director, .... J. Cheston Morris, M.D. 



Vice- Director, 

 Treasurer, 

 Conservator^ . 

 Corresponding Secretarn, . 

 Recorder, 



49 



T. Chalkley Palmer. 

 Lewis Woolman. 

 Frank J. Keeley. 

 Silas L. Schumo. 

 Charles S. Boyer. 



Charles S. Boyer, 



Recorder. 



