190-4.] NATURAL SCIENCES OF PHILADELPHIA. 849 



now contains 27 members of the Academy and 21 contributors, or 48 

 in all. 



The following officers of the Section have been elected for the year 

 1905: 



Director, Benjamin Smith Lyman. 



Vice-Director, George Vaux, Jr. 



Recorder and Secretary, . . . Miss Mary S. Holmes. 



Treasurer, . . ... . Miss Emma Walter. 



Conservator, Frank J. Keeley. 



Respectfully submitted by order of the Section, 



Ben J. Smith Lyman, 



Director. 



The Biological and Microscopical Section. 



The numerical strength of the Section is the same as that of last 

 year, two members ha\dng withdrawn and two having been admitted. 



The interest in the regular sessions has been increased by the dis- 

 cussions at the informal meetings which have formed a pleasant feature 

 of the year's work. Numerous communications have been made, 

 among which may be especially mentioned those of Mr. F. J. Keeley. on 

 various accessories of microscopic manipulation; by Mr. T. C. Palmer on 

 Trachelomonas; by Dr. D. E. Owen on dredgings in Saco Bay, and by 

 Mr. Hugo Bilgram on Myxomycetes. Every member present has made 

 an effort to offer at each meeting some object or subject which, if not 

 new, has at least stimulated the work of others. A special topic which 

 has occupied the attention of the Section is that of the microscopic 

 structiu'e of rocks. 



The Conservator reports that the instruments belonging to the Sec- 

 tion are in good working order, and the following additions have been 

 made during the past year : One Zentmayer Portal^le Histological Stand , 

 one Dissecting ^Microscope, one Beck Microscope Lamp, one Acme 

 Microscope Lamp, one Balance, two large Slide Cabinets with Drawers, 

 four small Slide Cabinets with Trays, some miscellaneous accessories 

 and over 500 mounted slides, all presented by Mrs. Charles Shaeffer. 

 One hundred and fifty-eight slides, prepared by L. Woolman, were 

 presented by Mr. F. J. Keele}^ 



One Tolles J^-inch Objective was purchased. 



The officers elected for the following year are as follows : 



