CO 
Stated Meeting, January 20, 1871. 
Present, twelve members. 
Gro. B. Woon, President, in the Chair. 
A. letter was received from the Illinois Industrial Uni iver- 
sity at Champaign, dated Jan. 12, 1871. 
Letters of envoy were received from the R. Saxon Society, 
and the Society of Natural Sciences at Chemnitz. 
Donations for the Library were received from the Royal 
Academies and Societies at Berlin, Leipsig, Munich, Chem 
nitz, Altenburg, Quebec and Montreal; the London Astro- 
nomical, Antiquarian and Meteorological Societies; the 
American and Medical Journals, Prof. Greenough of poe 
bridge, Dr. D. D. Slade of Chestnut Hill, Mass., Prof. E. 
Andrews of Columbus, Ohio, and Gen. Tyndale. 
The death of Stephen Colwell, at Philadel phia, Jan’y 15th, 
aged 70 years, was announced by Prof. Cresson; and on mo- 
tion, Mr. Carey was appointed to prepare an obikesns notice 
of the deceased. 
The death of Dr. Edward Rhoads, at Philadelphia, Jan’y 
. ane x 
1dth, aged 29 years, was announced by Professor Trego. 
Mr. Lesley was elected Librarian. 
The Committee to which was referred the paper of Dr. 
Pepper, on a case of universal Hyperostosis, reported in favor 
of its publication in the Proceedings of the Society, aceompa- 
nied with figures for two octavo plates, which, on motion of 
Prof, Cresson, was so ordered. 
A communication entitled: “Computation of the effects of 
gradients, by Herman Haupt,” was read by the Secretary. 
