728 GEOLOGY AND TOPOGRAPHY OF THE LEAD REGION. 







connected with the engine shaft that the two unite below and make a large sheet (as is 

 usually the case), which continues down to the lower opening. 



At the west pump shaft 



a winze 1 was sunk by a FIG. 19. 



former company to a 

 depth of 40 feet in the 

 St. Peters sandstone, with 

 the intention of penetrat- 

 ing through the forma- 

 tion. A small amount of 

 blende is said to have 

 been found, but no regu- 

 lar sheet. Considerable 

 ferruginous matter was 

 also found. 



There appears to be no 

 reason why the ground 

 should not continue remunerative for a long time, as it is comparatively easy to work, 

 and the amount of water relatively small. It seems quite likely that these ranges may 

 connect on the north with Morrison's diggings, p. 729, and on the south with the Faul dig- 

 gings, p. 729; should the latter prove true the mines would all drain into the creek near 

 Linden, and be worked at much less expense. 



It is estimated by the owners that during the first six months of their operation, the 

 mine produced ten tons of zinc ores per day; and from that time to the present it has 

 produced twenty tons of zinc per day, and more than 300,000 pounds of lead ore per 

 annum. The value of all ores for the last two years is estimated at $500 per day. The 

 mine now furnishes constant employment to one hundred and eighty miners and other 

 employes. The owners have lately introduced the Ingersoll pneumatic drill with air 

 compressor; and use Rend rock extensively, the explosions b3ing effected by an electric 

 battery. 



Poad, Barrett & Tredinnick Bros. S. W. qr. of N. W. qr., Sec. 8, T. 5, R. 2 E. 



This is a very old mine, the property of Mr. John 

 Heathcock, known as tl e Robarts mine, on 

 which work had been discontinued for several 

 / years, until 1869, when it was again resumed. 

 The present party have been working about four 

 2 years, and have sunk ten shafts from 40 to 70 feet 

 deep. The water is removed by two horse pumps. 

 To the west of the above parties, and on the same 

 j range, are Kisselbury Bros., Hammersoa and 

 2 Trewatha. Also on the east end of the same 

 range are the Poad Bros., Tredinnick, Vial 

 1 and Geach. 



The Robarts range has been traced for a dis- 

 tance of a quarter of a mile, the ore being found 

 in flat sheets, 25 feet above the glass rock. The 

 manner in which the ore is deposited is very re- 

 markable, and is shown in the annexed sketch, 

 from which it appears that fie order of deposition 

 was, 1st, pyrites; 2d, blende; -V, galenite. This 

 is one of the few localities in the Lead region from which cerussite is ou ained.' 

 1 A winze is a subterranean shaft which does not extend to the surface. 



FIG. 20. 





SECTION OF SHEETS IN THE POAD MINE. 



1. Galena limestone, cap and floor of 

 opening. 2. Sheet of Iron Pyrites 3 to 

 4 inches thick. 8. Sheet of Blende 1 in. 

 thick. 4. Sheet of Galenite 1 to 6 inches 

 thick. 



