510 MINING mDTJSTEY. 



claims, involving for each the necessity of sinking expensive shafts, providing 

 hoisting works, and sustaining separate organizations for management or 

 superintendence. 



Narragansett. — The first of the above-named companies, the Narragan- 

 sett, ov^^n 400 feet of the lode, and have opened their mine to the depth of 450 

 feet. The greater part of this work was done several years ago. Costly hoist- 

 ing works and crushing machinery were provided at the mine, but operations 

 were suspended in 1866, as the results then obtained were not satisfactory. 

 This condition, it is said, was chiefly due to the want of an efficient method 

 of treating the ores. In 1868 work was resumed by parties who leased the 

 property, and the main shaft was sunk an additional hundred feet. It is said 

 that encouraging results were obtained, but about this time the work on the 

 Bobtail lode was suspended, and such is the connection between the two 

 veins that the water of one affects the other. As the pump on the Bobtail 

 ceased to drain that lode, the water increased so much in the Narragansett 

 that operations were again suspended. The mine was therefore inaccessible 

 to the writer. The work represented in the accompanying section is in ac- 

 cordance with statements made to the writer by several parties somewhat 

 acquainted with the mine, but more stoping has probably been done above 

 the lower levels than is indicated in the sketch. 



Consolidated Gregory. — The Consohdated Gregory Grold Mining Company 

 own 500 feet of this lode, working as one mine what was formerly divided up 

 into several short, independent claims. The mine is opened by three shafts, 

 of which the central one is the chief, having reached the greatest depth and 

 being fitted up in the most substantial manner, provided with pumping and 

 hoisting machinery and other facilities for permanent and extensive operations. 

 This shaft was begun from the surface by the Consolidated Company, and has 

 reached a depth of over 400 feet. The east shaft, sunk by the former owners, 

 was abandoned by the new company as a means of working, and only kept 

 open for ventilation. The west shaft is used for hoisting, the power for that 

 purpose being transmitted from the machinery at the central shaft. The first 

 level is at a depth of 230 feet below the mouth of the central shaft; the 

 second level is 70 feet lower, and the third level is 60 feet below the second. 

 The good ground, in the upper portion of the mine, has been pretty much 



