IN , Vou. XXVIL 
: Established by BENJAMIN SILLIMAN in 1818 
THE 
EDITORS | 
ff} JAMES D. ano E. S DANA, anv B. SILLIMAN. | 
: ASSOCIATE EDITORS 
ASA GRAY, JOSIAH P. COOKE, AND 
PRoFESSORS 
JOHN TROWBRIDGE, oF Bee eeiue ne ae 
