11 
able assistance in caring for the special collections, particulars of 
which will be found in their several reports. 
Important assistance has also been rendered by the students of 
the Jessup Fund. Much assistance has been given to specialists by 
placing the collections at their disposal, and in addition to the 
many who have made use of material at the Academy, specimens 
have been loaned to representatives of various scientific institutions 
throughout the country, including Anthony Woodward, Henry C. 
Mercer, T. Wayland Vaughan, Fred’k. A. Lucas, L. M. Under¬ 
wood, H. M. Smith, Walter Faxon, C. F. Millspaugh, H. C. Ober- 
holser, B. L. Robinson, T. W. Stanton, Robert Ridgway and others. 
Henry C. Chapman, M. D., 
Chairman of the Curators . 
REPORT OF THE BIOLOGICAL AND MICROSCOPICAL 
SECTION. 
The Section has held ten meetings during the past year with 
slightly increased average attendance. Communications of general 
interest have been made at each of the meetings, diatoms and 
bacteriology receiving special attention. 
The Conservator reports the purchase of several new objectives. 
Donations to the museum were made by Dr. J. C. Morris, and a large 
aquarium was presented by Mr. Holman. The following commu¬ 
nications were made to the Academy : 
“Demonstration of Absorption of Carbon Dioxide and of the 
Generation of Oxygen by Diatoms,” by T. Chalkley Palmer. 
“Dentition of Snails,” by Professor Pilsbry. 
“ Furs,” by Dr. Morris. 
“ The Neuron,” by Dr. A. O. J. Kelly. 
“Structure of the Diatom Valve,” by F. J. Keelev. 
The officers of the Section are as follows : 
Director , ..... J. Cheston Morris, M. D. 
Vice-Director, . . . . T. Chalkley Palmer. 
Treasurer, ..... Charles P. Perot. 
Conservator, . . . . F. J. Keely. 
Corresponding Secretary, . . John G. Rothermel. 
Recorder, ..... Charles S. Boyer. 
Charles S. Boyer, 
Recorder . 
