478 PHILOSOPHICAL SOCIETY OF WASHINGTON. 
Mr. Ren]i! de Saussure read a paper on Graphical determina¬ 
tions of stream lines. 
It was discussed by Mr. Bigelow. 
491st Meeting. December 10, 1898. 
President Bigelow in the chair. 
Thirty members and guests present. 
Messrs. Wead and Goodfellow were appointed an auditing 
committee. 
Mr. Adler made an informal communication on The forging 
of antiquities. 
Mr. Ren£ de Saussure read a paper on Graphic determina¬ 
tions of stream lines in vortex motion. 
It was discussed by Messrs. Bigelow, Gore, and the author- 
Mr. W. H. Dall read a paper on The proposed University of 
the United States. [Published in the American Naturalist, 1899, 
February, vol. xxxiii, no. 386, pp. 97-107.] 
It was discussed by Messrs. Sternberg, Ward, Adler, Abbe, 
and Gore. 
Mr. Bigelow read a paper on Two remarkable semi-diurnal 
periods. [Published in International Cloud Report, 1899, p. 
474.] 
492d Meeting. December 22 , 1898 . 
TWENTY-EIGHTH ANNUAL MEETING. 
President Bigelow in the chair. 
Fourteen members present. 
The minutes of the Twenty-seventh Annual Meeting were 
read and adopted. 
The annual report of the Secretaries was read and accepted. 
