THE 
AMERICAN JOURNAL 
OF io 
if ™ . 
SCIENCH AND ARTS. 
CONDUCTED BY 5 : 
PROFESSORS B. SILLIMAN,. B. SILLIMAN, Jr, 
AND ; pe 
JAMES ‘D. DANA, 
IN CONNECTION WITH 
PROF. ASA GRAY, or CAMBRIDGE, 
PROF. LOUIS AGASSIZ, or CAMBRIDGE, 
DR. WOLCOTT GIBBS, or NEW YORK. 
~ 
SECOND SERIES. 
No. 69.—SEPTEMBER, 1855. 
NEW HAVEN 
