700 GEOLOGY AND TOPOGRAPHY OF THE LEAD REGION. 



second opening, which lies about 30 feet above the upper surface of the Blue limestone. 

 Their annual production is 30,000 Ibs. 



Dilger Mine. N. W. qr. of N. W. qr. Sec. 24. This is a new range discovered in 

 January, 1876. The works are as yet confined to the first opening, which is here 30 feet 

 above the second. It has produced during the past year 40,000 pounds. 



Hayward Range. 6. W. qr. Sec. 13. This range has been worked continuously 

 every winter since its discovery in 1841, and has yielded in all between four and five 

 million pounds. It is now worked by Messrs. Jackson & Galloway in the second open- 

 ing, which is here from 30 to 40 feet wide. It produces about 100,000 pounds per an- 

 num. 



Warfield Range. S. W. qr. Sec. 13. This range has been worked every winter 

 during the last thirty years, and has produced about 2,000,000 pounds. It is now 

 worked by Messrs. White & Dunn in the second opening, which is here from 30 to 40 

 feet wide. Its annual product is about 100,000 pounds. 



Cuniow and Pillow Range. S. W. qr. Sec. 13. This range has not been idle 

 during the last thirty years, and is still productive. During the last fifteen years the 

 range has produced over 100,000 pounds per annum. Messrs. Nichols & Stephens are 

 now mining on it, and producing 20,000 pounds per annum. 



Emery and Davis Level. N. W. qr. of N. W. qr. Sec. 24. The level was com- 

 menced in 1852, and is now 600 feet long, and drains the ground in its vicinity nearly 

 as low as the second opening; its cost was about $20,000. The excavations here were 

 of the nature of a quarry, several flat sheets of lead ore being found interstratified with 

 the Galena limestone. While the level was in operation, the annual product was about 

 100,000 pounds. The level drains the Langstaff and Willey ranges, which were discov- 

 ered about thirty years ago, and have been worked continuously ever since. Most of 

 the lead ore is obtained from the first opaning ; the annual product is 50,000 pounds. 

 These ranges have been worked to the present water level, leaving sheets of ore from 

 12 to 18 inches thick going down. The level should be run a few rods farther to con- 

 nect with a noith and south crevice; it would then probably drain all the ranges much 

 deeper. 



Stone & Bryhon. Situated near the N. W. corner of Sec. 1, T. 3, R. 3 W., on 

 land owned by Mr. Stone, about three miles north of the village of Rockville. The 

 works are in the first opening, which is from eight to ten feet wide. They have been 

 worked in the winter season during the last four years, producing annually between 

 30,000 and 40,000 pounds. They were formerly worked by Mr. Grusham and were 

 more productive. The mines are dry. 



Griswold Diggings. Situated about a quarter of a mile south of the preceding. 

 These are dry diggings worked in the first opening, which is here about six feet high 

 and from ton to thirty feet wide. They have been worked continuously during the last 

 seven years, producing about 65,000 pounds per annum. 



Henry Gillilan's Diggings. These diggings are situated about three miles south- 

 east of Rockville, on the Platte river. They are dry diggings, and have been worked 

 during the last four years, in the first opening, which is here thirty feet wide and about 

 six feet high. The annual product is 25,000 pounds. 



British Hollow Diggings. 



But little mining is now done in these mines. In the winter saason about twenty 

 men are employed. The following parties are now mining here: 



J. Alderson's Diggings. N. W. qr. Sec. 26, T. 3, R. 3 W. They are situated on 

 the Craig range in the village of British Hollow. This range was worked by a Cincin- 

 nati company for three years; they abandoned it two years ago. This, company 

 produced about three million pounds during the time of their operations. Mr. Alder- 



