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ae 
Published the first day of every second month, price 85 fer year. 
os go i z ae 
on, * 
_ SCIENCE AND ARTS. (| 
. 2 S 
CONDUCTED BY 
ede eens es sh Ss 
pessors B. SILLIMAN ann B. SILLIMAN, Jn., 
AND me 
JAMES D. DANA. 
' ~No. 28.—JULY, 1850. fe 
