Zinc DtH ilver Izul to n . 



109 



SIIA'ER OBTAINED. 



No. 1. 



No. 2. 



Quantity of silver in the retined Avork lead 

 Silver tapped from the cupelle .980 tine 



6,088.75 oz. 

 Silver tapped from the cupelle .989 fine 



5,714.50 oz. - - - I 



Small pieces of silver from the cupelle 



.970 fine 150.00 oz. 

 Small pieces of silver from the cupelle 



.970 fine 115.00 oz. - - j 



In market lead 0. 33 oz. pr. ton in 67, 104 lbs. 

 " 0.33 " " 53.420 " j 



"litharge "30 " " 5,209 " 



Total silver obtained. 

 Silver not recovered. 



Percentage of silver obtained, 



ozs. 



ozs. 

 6,305.6 



ozs. 



6,031.66 





5,645.9 



146.50 







ozs. 

 6,165. 



11.18 



6,189.34 

 116.26, 



6,305.60 6,305.6 6,165.9 

 98.1' ' 93.8' 



111.5 



8.9 

 78.0 



5,844.3 

 321.6 



6,165.6 



LEAD OBTAUSTED. 



No 



. 1. 



No. 



2. 





lbs. 



lbs. 



lbs. 



lbs. 



Work lead used . . - . 





87,294 





62,895 



" Schlicker " 3,497 lbs. at 80 per ct. 



2,797 









Impure Litharge from dezincation, 3,500 lbs. 











at 80 per ct. lead. 







2,800 





Lead in zinc crust, - - - - 



7,765| 



5,002 





Soft market lead, - - - - 



67,104; 



53,420 





Oxides and skimmings from market kettles, 









1,000 lbs. at 95 per ct. lead, - 



950; 







Oxides and skimmings from market kettle. 



1 



i 





700 lbs. at 95 per ct. lead. 







665 i 



Litharge from dezincation, 7,810 lbs. at 80 per 











ct. lead, - - - - 



6,248 









Lead from liquation, 



808 





- 





Total lead, - - - - 



85.672 



61,887 





Loss about 1.9 per ct., 



1.622 









" 1.7 







1,008 







87,294 



87,294 



62,895] 62,895 



The following example of an operation at the Penn. Co.'s 



works lias been i)repared for me by Mr. J. A. Knajjp, formerly 

 the Superintendent there : 



Quantity of argentiferous lead, from Utah ores, charged, - 26 tons. 



Quantitj^ of silver after dressing in the softening-furnace, - 55.94 oz. 



Number of skimmings, ------ 2. 



Intei'val between skimmings, - - - - - 6 hours. 



After dressing in the zinc kettle, the lead contained silver, - 57.63 oz. 



After the first addition of zinc, " " " - 13.34 " 



The second addition of zinc was - . . - goO lbs. 



