STATISTICS OF THE PRODUCTION OF LEAD ORE. 



743 



Smithsonite, 



Tear. Ms. 



1870 4,429,585 



1871 16,618,160 



1872, 27,694,574 



1873 20,538,946 



1874 15,123,050 



1875 11,878,210 



1876, to October 1st 12,168,540 



Total 138,933,730 



Blende, 



Ibs. 



7,414,022 

 9,303,625 

 16,256,970 

 15,089,514 

 19,500,465 

 20,538,190 

 17,181,490 



115,456,441 



The following statistics of the shipment of ores and metals over the Mineral Point 

 railroad were furnished through the kindness of Mr. C. Spensley, of Mineral Point: 



Year. 



1857 



1858 



1859 



1860 



1861..., 



1862 



1863 



1864 



1865 



1866 



1867 



1868 



1869 



1870 



1871 



1872 



1873 



1874 



1875 



1876, to October 1, 



Lead, Ibs. 

 1,780,490 

 3,451,539 

 2,991,925 

 3,548,335 

 2,360,663 

 2,511,161 

 2,180,570 

 1,763,769 

 2,708,478 

 1,837,720 

 2,854,000 

 2,854,397 

 1,948,000 

 4,352,400 

 3,027,520 

 3,577,777 

 1,972,230 

 3,077,020 

 2,632,940 

 2,402,000 



Zinc Ores, Ibs. 



240,000 

 200,000 



840,000 



2,380,000 



3,148,650 



5,380,000 



2,660,000 



4,484,000 



8,780,000 



12,740,000 



21,140,000 



30,900,000 



27,414,000 



28,022,000 



31,538,000 



23,538,000 



Spelter, Ibs. Lead, White, Ibs. 



103,400 

 701,210 

 630,580 



67,510 



983,010 



1,317,370 



1,360,000 



These estimates will include the greater part of the pig lead, and the zinc ores pro- 

 duced in the northern, central, and eastern parts of the Lead region; and all the spelter 

 and zinc white produced at the old Mineral Point Zinc Works, which have lately been 

 torn down and sold. 



The statement of zinc ores shipped by the railroad is much too small to represent tho 

 true production of this part of the Lead region, as no allowance is made for overloading 

 the cars, and for calcination, which would make the amount fully one-fourth greater. 



STATISTICS OF THE PKODUCTION OF LEAD OEE 



in tlie Lead Beg ion, from January 1, 1862, to October 1, 1876. 



During the progress of this survey, much time and care have been devoted to this 

 portion of the work, in writing to and personally soliciting information from all persons 

 possessed of it, and especially from the smelters. We have sought to prepare a state- 

 ment of the amount of lead ore produced annually in each district, and a conbimed esti- 

 mate of the total amount for the Lead region. 



