722 GEOLOGY AND TOPOGRAPHY OF THE LEAD REGION. 



feet. Fifteen men are now employed here, the average being about twelve. Previous 

 to 1864, the mine was worked chiefly for lead ore, producing in some years as much as 

 170,000 pounds. It is estimated by Mr. Ross that it produced from 1862 to 1875, 

 3,000,000 pounds of lead ore and 11,000 tons of blende. The production for 1875 was, 

 blende, 375 tons; lead ore, 55,000 pounds. The production for 1876 was, blende, 600 tons; 

 lead ore, 40,000 pounds. 



Jenkins, Miller & Co. These parties have been working during the last two and a 

 half years on the Dunbar range, which is parallel to the Penitentiary, and a short dis- 

 tance north of it. The land is owned by Messrs. Ross & Dean. This range has been 

 worked during the last thirty years, and is drained by the Penitentiary level; the pres- 

 ent workings are about 50 feet below the surface. The company produced during the 

 year 1S7G, to October 1st, blende., 80 tons, lead ore, 8,000 pounds. Their annual average 

 is blende, 80 tons, lead ore, 12,000 pounds. 



Rain, Young & Jenkins. These parties are now working on the Blackjack range, 

 which is adjacent to the Dunbar, and sometimes connects with it. The present works 

 are 50 feet below the surface. The ore is found in flat sheets, sometimes 70 feet in. 

 wvlth, in the pipe clay opening, the height of the opening averaging five feet. The 

 annual production is from 150 to 200 tons of blende, and from 10,000 to 15,000 pounds 

 of lead ore. 



A short distance northeast of the Blackjack is the Owens range. It has not been 

 worked during the last two years, but is considered good mining ground. 



CENTERVILLE DISTRICT. 



These diggings are like those in the village of Highland, in that they are ah situated 

 quite close together, on Sec. 7, T. 6, R. 1 E., on the hill about a quarter of a mile east 

 of the village. 



The land is ah 1 owned by Messrs. Top, Norndorf & Kroll. The miners are nearly all 

 Germans, from whom the following information was extracted : 



The diggings were first worked in 1836, and have been worked continuously ever 

 since, chiefly for lead ore, until within the last ten years, since which time they havo 

 been worked for zinc ores. The workings are in the Brown-rock opening, and lie from 

 five to fifty feet below the surface, depending on the amount of denudation. Very little 

 trouble is experienced from water, and during the past two years the ground has been 

 especially dry. The principal parties working here are as follows : 



Heller and Parish. These parties are working a southeast and northwest range, 

 1,200 feet long and 600 feet wide. Their annual product is: Lead ore, 100,000 pounds.; 

 blende, 500 tons; Smithsonite, 400 tons. 



John Carter and Richard Samuels. On the same range as the preceding. They 

 have worked here two years, and are producing 200 tons of Smithsonite and 5,000 . 

 pounds of lead ore per annum. Other parties and their annual products are as follows: 



Schock and Flemmer. Blende, 200 tons per annum. 



Stepper and Mensing. Blende, 100 tons per annum. 



George Wieble. Blende, 200 tons; lead ore, 15,000 pounds. 



Blue River Paint Works. 



Situated on the S. W. qr. of Sec. 7, T. 6, R. 1 E. At the time this establishment 

 was visited, work had been suspended, and consequently did not appear in as flattering 

 a light as its merits would probably justify. The building and machinery was still 

 standing, in a condition to resume work without delay. 



According to the best information obtained, the paint was made from the ocher which 

 is quite abundant in the Centreville diggings, and which furnishes quite a' number of 

 shades of yellow in its raw state, and an additional number on being burned. The red 



