MAY)-1958. 2. No. 63. 
Published the first day of every second month, price $5 per year. 
f 
|} AMERICAN JOURNAL 
SCIENCE AND ARTS. 
CONDUCTED BY 
PROFESSORS B. SILLIMAN, B. SILLIMAN, Jr, 
; 
4 
8 
AND 
| JAMES D. DANA, 
IN CONNECTION WITH 
PROF. ASA GRAY, or CAMBRIDGE, 
PROF. LOUIS AGASSIZ, or CAMBRIDGE, 
DR. WOLCOTT GIBBS, or NEW YORK. 
SECOND SERIES. 
2 ss 
No. 63..MAY, 1856. 
> 
NEW HAVEN: EDITORS. : 
_ NEW Yo RK: G. P» PUTNAM & CO. 
