730 



GEOLOGY AND TOPOGRAPHY OF THE LEAD REGION. 



DODGEVILLE DISTRICT. 



The mines of this district comprise those in the immediate vicinity of the village; the 

 zinc ore diggings situated about two miles east of the village, and those on Van Meter's 

 survey, about four miles west of the town. 



The most productive and profitable are those situated east of the village, worked for 

 drybone, blende and lead ore. 



Evan Williams' Mines. S. W. qr. of S. W. qr. Sec. 25, T. 6, R. 3 E. These mines 

 were discovered in 1844, and were worked at intervals until 1853. Since then Mr. Wil- 

 liams has worked them continuously to date. The ore is found in flat sheets about 100 

 feet wide in the lower beds of the Galena limestone; and the ground is drained by a 

 level a quarter of a mile long. The annexed sketch, made from an underground sur- 

 vey, shows some of the more recent works. 



FIG. 21. 



PLAN OF EYAN WILLIAMS' DIGGINGS. 



Mr. Williams estimates that this range has averaged 50,000 pounds of lead ore per 

 annum during the last twenty years. Previous to 1863, they were worked exclusively 

 for lead Ore. Since then they have averaged 100 tons per annum of blende; the pro- 

 duction rising in some years to 200 tons. During the present year (1876) two men have 

 been employed here, and have produced 30,000 pounds of lead ore and 125 tons of 

 blende. 



In November, 1875, Mr. Williams commenced working about 700 feet south of the 

 preceding location. A flat sheet was found here at a depth of 90 feet, and has been 

 proved horizontally a distance of 60 feet. This mine in the past year has produced, lead 

 ore 15,000 pounds; blende, 50 tons. 



In July, 1876, Mr. Williams sunk a shaft 25 feet deep about quarter of a mile west of 

 the center of Sec. 25, and discovered aflat sheet of blende about five inches thick, from 

 which he has obtained about three tons of blende. 



Owens & Powell. On the S. W. qr. of S. E. qr. of Sec. 25 are some small drybone 

 diggings on Mr. Williams' land. Three men are employed here, producing five tons of 

 ore per annum. This is known as Rounds' range. 



Jones, Farrager & Owens. S. W. qr. of S. W. qr. of Sec. 25, near the west line 

 of the section on Evan Williams' land. This is an old range which has been worked 



