52 F. Field on a new Mineral. 
A 
rin) 
ao 
Is Own countrymen roud 
exclamation, “The whole earth is the monument of i 
our race one so marvellously gifted to comprehend the works of 
Art. IX.—Description of a new Mineral Species from Chili; y 
FREDERICK Fietp. (From a letter to J. D. DANA, 
Guyacana, Coquimbo, Chili, September 6, 1858). 
_ISEND youa specimen of a mineral from the Cordilleras: 
Chili, which appears to me highly interesting. It consists entirely 
of copper, arsenic and sulphur, having the following com : 
Copper, - - - 48° 
Sulphur, - - - - by 
ae = A, 
Tron, silver, = - - traces. 
takes the place of the iron; a specimen of Tennantite ha 
the following value: Cu 48-2, As 12°5, Fe 9-0, S 3114. 
