1900.] MINUTES. 345 
Stated Meeting, April 20, 1900. 
Vice-President WiIsTARr in the Chair. 
Present, 7 members. 
A letter was read from the President, announcing the ap- 
pointment of Mr. Hampton L. Carson to prepare an obituary 
notice of the late William M. Tilghman, and of Prof. 
Samuel P. Sadtler to prepare one of the late Charles Bul- 
lock ; also letters from Messrs. Carson and Sadtler accepting 
the appointments. 
The death, on April 10, of Frank Hamilton Cushing, of 
Washington, D. C., aged forty-three years, was announced. 
Dr. Coleman Sellers made a communication on his late trip 
to Europe, and his investigations on the manufacture of car- 
bide of calcium and caustic soda, and the operations of elec- 
tric plants from the improved water-power of the river 
Rhone. 
The Society was then adjourned by the presiding officer. 
Stated Meeting, May 4, 1900. 
Vice-President SELLERS in the Chair. 
Present, 17 members. 
A letter was read from Prof. W. C. Broégger accepting 
membership. 
Acknowledgments of the receipt of the Society’s resolu- 
tions of April 6, relative to the establishment of a National 
Standards Bureau, from Prof. Pritchett, Superintendent of 
the U. S. Coast Survey; the Speaker of the House of 
Representatives, the Chairman and Messrs. O’Grady and 
Levy, members of the Committee on Coinage, Weights 
and Measures; Senator Penrose, and Representatives J. R. 
Young, H. H. Bingham and R. Adams, Jr. 
