736 GEOLOGY AND TOPOGRAPHY OF THE LEAD REGION. 



distance of 450 feet, with an average width of 40 feet. The opening is in the Brown 

 rock, and from four to six feet high. There are two shafts, each about 40 feet deep. 

 The ore occurs in flat sheets, and is mostly Smithsonite and blende in about equal quan- 

 tities, containing little lead ore. The ground was formerly worked chiefly for blende. 



The ground is estimated to have produced 2,400 tons of blende, and 1,100 tons of 

 Smithsonite since 1862. Their present annual product is blende, 200 tons, and Sniith- 

 sonite, 150 tons. 



Manning & Delaney. Situated about 600 feet west of the preceding. It is an east 

 and west range which was discovered twenty years since, and has been worked by sev- 

 eral different parties, who have proved the ground in the Brown-rock opening for a dis- 

 tance of 600 feet. The present parties have worked it for the past four years, princi- 

 pally for Smithsonite, no blende being found until the spring of 1874. The deepest 

 shaft is only 40 feet; sunk to the top of the Blue limestone, which is here estimated at 

 25 feet. The St. Peters standstone is plainly seen in the valley a short distance below. 

 The ground produced 600 tons of Smithsonite during the years 1873 and 1874. The 

 diggings are quite dry. 



Hornsnoggle Ridge. Situated on the N. E. qr. of Sec. 5, T. 6, R. 1 E. This is an 

 east and west range about half a mile in length, which was discovered about twenty-five 

 years since, and worked for lead ore in the Brown-rock opening; but is now pretty much 

 worked out. The only ore found on the ridge is drybone. The present annual produc- 

 tion is about 1,500 tons. 



Beginning at the eastern end, and going west, the following parties are working: 



Joseph (/all. Worked here since 1871, amount produced unknown. 



Borey & Newmeyer. Worked since 1872, produced 1,500 tons. 



Brinnen & Kelley. Worked on a lot here 20 years, product 1,000 tons. 



LINDEN DISTRICT. 



The principal diggings in this district are those of the Linden Mining Co., owned by 

 Messrs. J. J. Ross and Wni. T. Henry, of Mineral Point. The property consists of the 

 E. hf. of E. hf. of Sec, 6, W. hf. of Sec. 5, N. E. qr. of S. W. qr. of Sec. 7, N. E. qr. 

 of S. E. qr. of Sec. 7, S. hf. of S. W. qr. of Sec. 8, S. W. qr. of S. E. qr. of Sec. 8, N. 

 W. qr. of N. E. qr. of Sec. 17, S hf. of N. E. qr. of Sec. 17, all in T. 5, R. 2 E., and is 

 situated a short distance west of the village of Linden. They were first opened in 1833, 

 and worked by various parties up to 1853, altogether for lead ore, and in the middle 

 beds of the Galena limestone. Prior to 1853, they are said to have produced 40,000,000 

 K>s. of lead ore. 



In 1853 they were bought by a Pittsburg company, and operated with a water wheel, 

 in the upper and lower pipe-clay openings, also for lead ore. The amount of lead ore 

 produced by them was about 500,000 pounds per annum. The works finally became un- 

 profitable, and were suspended by them in 1866. In this condition they remained until 

 the spring of 1874, when they were bought by Messrs. Ross & Henry, by whom work 

 was resumed in April. They are now operated for blende or blackjack, Smithsonite 

 and such lead ore as incidentally occurs with it. On resuming work the principal ope- 

 rations of the first six months were cleaning out the old shafts and drifts, erecting a new 

 engine of thirty horse power, with a lift pump, together with the necessary buildings, and 

 other machinery. The sheets worked here have a singular complication of " flats and 

 pitches," both in their connection with each other, and in respect to then- general course, 

 which can be best understood by reference to Plate XXX. The lines marked North, South, 

 and Middle pitches, are inclined and flat sheets, consisting chiefly of blende, which are now 

 being worked. The shaded portions represent the ground worked out, but leaving along 

 the sides of the workings, and on the unworked portions of the several pitches, a sheet of 



