Established by BENJAMIN SILLIMAN in 1818. 
MERICAN 
| JOURNAL OF SCIENC. 
ann EDWARD 
SSOCIATE EDITORS 
A GRAY, JOSIAH P. COOKE, axn 
SOHN TROWBRIDGE, or Caxnrivex, 
Prorsssors H. A. NEWTON anv A 
Oe New Bice 
