. 
AMERICAN JOURNAL 
BENJAMIN SILLIMAN, M. D. LL. D. 
Prof. Chem., Min., &c. in Yale Coll.; Cor. Mem. Soe. Arts, Slee, sat Com. and : 
For, Mem. Geol. Soc., London; Mem. Geol. Soe., Paris; Mer. Roy. Mi 
; Nat. Hist. 
_ PRINTED BY B. L. HAMLEN. 
