462 
PHILOSOPHICAL SOCIETY OF WASHINGTON. 
Mr. J. Howard Gore read a paper on A Dutch practical 
charity. 
It was discussed by Messrs. Bigelow, G. L. Burr, and the 
author. 
465th Meeting. March 6, 1897. 
President Baker in the chair. 
Seventeen members present. 
Mr. J. W. Powell read a paper on Principles of classification. 
[For the substance of this paper see “ On Regimentation,” Fif¬ 
teenth Annual Report of the Bureau of Ethnology, pp. civ- 
cxxi, Washington, 1897.] 
It was discussed by Messrs. Ward, Baker, and the author. 
Mr. J. Elfreth Watkins read a paper on A forgotten experi¬ 
ment of Franklin’s. 
Mr. Baker read a paper on The boundary of the District of 
Columbia. [Published in the Records of the Columbia Historical 
Society, 1897, vol. i, pp. 215-224.] 
466th Meeting. March 20, 1897, 
President Baker in the chair. 
Eighty-two members and guests present. 
Mr. S. P. Langley made a communication on Mechanical 
flight. [For the substance of this paper see McClure’s Maga¬ 
zine, 1897, June.] 
This was discussed by Messrs. Paul, Gilbert, Hazen, and 
Spofford. 
Mr. George M. Sternberg made a communication on Toxins 
and anti-toxins. [Not published.] 
It was discussed by Messrs. Kummell. Gordon, Mann, and 
the author. 
