256 Silver of Lane's Mine. 



of copper in the nitro-muriatic solution. The analysis was made by 



solution in nitro-muriatic acid, separating, washing, and reducing the 



chloride of silver, then evaporating the gold solution very slowly to 



dryness, and finally igniting the muriate and fusing the reduced gold. 



The balance is accurate to -^l^ grain. 



^^^o (Gold, 3.783 95.579 



3.958 grammes gave | g.^^^^,^ ^^^^ ^^^^ 



3.958 100.000 



V. Silver of Lane^s Mine. 



The silver analyzed below was obtained, by cupellation, from the 

 galena of Lane's mine, in Munroe, Connecticut. The metal has all 

 the characters of fine silver, except that it is rather harder. 



[a.) 1.01 gr9.mmes of the metal, when treated with nitric acid, 

 dissolved, except some brown floccuH, which were gold. The gold 

 was collected, washed and fused into a globule, with a little borax, 

 on charcoal, by the blowpipe. The globule weighed 0.004 grammes. 



(b) The silver was precipitated by copper, washed, and fused 

 into a globule with borax, on charcoal, by means of the blowpipe. 

 The silver weighed 0.991 grammes. The copper was precipitated 

 by iron, iused, and dissolved in nitro-muriatic acid. The silver held 

 in solution by the nitrate of copper in the first precipitation, was thus 

 changed into a chloride. This chloride of silver, during its fusion, 

 fumed like antimony, and by reduction gave a globule of silver 

 weighing 0.010 grammes. 



(c.) The solution of silver in nitric acid, when tested for copper 

 by ammonia, indicated a mere trace. 



The silver then of Lane's mine contains 



1.010 100.000 



The galena* of Lane's mine is remarkably rich in silver, and the 

 silver contains enough gold to make the separation an object of some 

 consequence. It is to be regretted that there is too little of the ga- 



* Prof. Silliman had before observed this, vide this Jojirnal, Vol. I, pp.312, 316, 

 405, and Vol. IV, pp, 52, 187. 



