1904.] 
NATURAL SCIENCES OF PHILADELPHIA. 
S49 
now contains 27 members of the Academy and 21 contributors, or 4S 
in all. 
The following officers of the Section have been elected for the year 
1905: 
Director, Benjamin Smith Lyman. 
Vice-Director, George Yaux, Jr. 
Recorder and Secretary, . . . Miss Mary S. Holmes. 
Treasurer, Miss Emma Walter. 
Conservator , Frank J. Keeley. 
Respectfully submitted by order of the Section, 
Benj. Smith Lyman, 
Director. 
' The Biological and Microscopical Section. 
The numerical strength of the Section is the same as that of last 
year, two members having withdrawn and two having been admitted.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 
structure of rocks. 
The Conservator reports that the instruments belonging to the Sec- 
tion arc in good working order, and the following additions have been 
made during the past year : One Zentmayer Portable 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. Keeley. 
One Tolies •^ r inch Objective was purchased. 
The officers elected for the following year are as follows: 
