THE 
AMERICAN 
JOURNAL OF SCIENCE, 
| EDITORS | se 
JAMES D. any E. S. DANA, ann B. SILLIMAN. 
ASSOCIATE EDITORS ins ean ee 
Prorrssors ASA GRAY, JOSIAH P. COOKE, ann” 
| JOHN TROWBRIDGE, or Camnrmer, 
Proressors H. A. NEWTON anp A. E. VERRILL 
- oe Mew Haven, oe 
ans Proressor GEORGE F. Pr 3 
if 4 
