1874.] 203 [Richards. 



ground three and a half feet in thickness, Mr. Kelly caused a hole to 

 be drilled through it horizontally, and the dust, which was all saved, 

 was assayed for silver, gold, and lead. This therefore, is the fairest 

 valuation of the ore that has as yet been made. The results were : 



Lead, 52 per ct. at 6 cts. per lb. $69.84 per ton of 2,240 lbs. 



Silver, .1736 per ct. at $1.29 per oz. 72.87 



Gold, .0017 per ct. at $20.60 per oz. 11.43 



$154.14 

 This gives the gross value of the ore per ton of 2,240 lbs. Prob- 

 ably eight or ten per cent will be lost in the working. Another val- 

 uation of the ore was made upon a larger scale. A lump one foot 

 thick, weighing about 500 lbs., was broken into three pieces, one of 

 which, weighing one hundred and forty-five lbs., was treated. This, 

 when crushed and sorted, yielded ninety-two lbs. of smelting ore, i.e., 

 a tolerably pure galena, which yielded 30 lbs. crude ingot lead, or 

 746 lbs. to the ton of 2,240 lbs. 

 This 30 lbs. yielded as follows : — 



23 lbs. refined lead. 

 436.32 grains silver. 

 4.19 " gold. 

 From this it appears that a ton of picked ore contains, in condi- 

 tion to be actually extracted and put in the market, as follows : — 

 560 lbs. lead at 6 cts. per lb. $33.60 



22 oz. silver at $1.30 per oz. 28.60 



101.8 grains gold at $20.60 per oz. 4.37 



$66.57 



A ton of the crude ingot lead, as produced by smelting, contains 



1710 lbs. lead at 6 cts. per lb. $102.60 



74 oz. silver at $1.30 per oz. 96.20 



341. grains gold at $20.60 per oz. 14.63 



$212.43 

 The deposit seems to be a true fissure vein, and will therefore prob- 

 ably last in depth, undergoing the usual pinching out and thickening 

 up again, after the manner of veins. No certain prophecy, however, 

 can be made in a district the veins of which have not been tested. I 

 have acted in consultation with Prof. Ordway in all matters connected 

 with this subject, while the assays and tests were made by Mr. Wil- 



