AMERICAN JOURNAL 
SCIENCE AND ARTS. 
CONDUCTED BY 
Prorrssors B. SILLIMAN ann JAMES D. DANA, 
IN CONNECTION WITH 
Proressors ASA GRAY, LOUIS AGASSIZ, anp 
WOLCOTT GIBBS, or CAMBRIDGE, 
- : 
AND 
Proressors S. W. JOHNSON, GEO. J. BRUSH, ann 
H. A. NEWTON, or NEW HAVEN. 
SECOND SERIES. 
VOL. XXXIX.—MAY, 1865. 
NEW HAVEN: EDITORS. 
1865. 
te ial 
PRINTED BY E. HAYES, 426 CHAPEL 8ST. 
