STATISTICS OF THE PRODUCTION OP LEAD ORE. 743 



Smithsonite, Blende, 



Tear. lbs, lbs. 



1870 4,429,585 7,414,022 



1871 16,618,160 9,303,625 



1872 27,694,574 16,256,970 



1873 20,538,946 15,089,514 



1874 15,123,050 19,500,465 



1875 11,878,210 20,538,190 



1876, to October 1st 12,168,540 17,181,490 



Total 138,933,730 115,456,441 



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. Lead. lbs. 



1857 1,780,490 



1858 3,451,539 



1859 2,991,925 



1860 3,548,335 



1861 2,360,663 



1862 2,511,161 



1863 2,180,570 



1864....- 1,763,769 



1865 2,708,478 



1866 1,837,720 



1867 2,854,000 



1868 2,854,397 



1869 1,948,000 



1870 4,352,400 



1871 3,027,520 



1872.... 3,577,777 



1873 1,972,230 



1874 3,077,020 



1875 2,632,940 



1876, to October 1, 2,402,000 



These estimates wiU 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 aU. 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 PEODUCTION OF LEAD OEE 



in the Lead Region, 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 peraonally sohciting 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. 



