1887.] ^^ [Genth. 



Sb,0, 



100.00 

 A portion of the ore, after washing off the lighter particles and remov- 

 ing the little friable lumps, which showed but a few pseudomorphous 

 crj^stals of mimctite composition, by a sieve of 16 meshes to the inch, a 

 yellowish sandy powder was obtained, which was analyzed. It was first 

 treated with dilute nitric acid for the determination of chlorine, and then 

 dissolved as far as possible in hydrochloric acid. 



The solution contained : 



100.00 



The ores from both mines are melted together with other tin ores, and 

 yield a crude metal, which, after some purification, furnishes a tin, very 



PUOC. AMER. PHILOS. SOC. XXIV. 125. D. PRINTED APRIL 28, 1887. 



