Doc. No. 9.] 87 







vein is three hundred and fifty feet above the Amidor, and increases in alti* 

 tude for half a mile, until it arrives at the height of four hundred feet above 

 the town. The company have sunk two shafts of ninety feet on the vein, 

 and drove two galleries, the upper one A being two hundred and eighty 

 feet, the lower, B, one hundred and fifty feet, and are driving in the course 

 of the dotted lines to run a third gallery at the depth of fifty feet below the 

 point B. Figures 1, 2, 3, are stopes from which they are now obtaining their 

 ore, being conveyed along the lower level to the whim-shaft and thence ele 

 vated to the surface ; from thence it is conveyed on a tram road 600 feet to 

 the reduction works at its terminus. 



The design for future operations is to cut an adit a short distance north 

 of the mill, and intersect the vein at a point which will give a depth of three 

 hundred feet from its highest point to a level with the end of their present 

 tram road, and then stope down from this point, which will not only furnish 

 an abundance of ore, if the vein retains its present power, but materially 

 lessen the expense of its extraction. This will be accomplished in a dis 

 tance of three hundred yards, and probably less. This mine is very sys 

 tematically arranged for the comfort of the miner, and obtaining all the ores 

 easily, and reflects much credit on its projectors ; the sketch of the mine, 

 drawn to scale on the spot, will fully elucidate itself; its convenience of 

 arrangement, considering its local position, will be found equal to all its 

 necessary requirements. 



The vein is invested in chlorite and talcose rocks, throughout its whole 

 extent, being nearly three miles in length. On the eastern side of the vein 

 a graphic slate occurs, having a thickness of one or two feet ; outside of 

 this a bed of chlorite, from five to ten feet, much discolored by graphite, 

 at times perfectly black and staining the hand easily. On the west side, a 

 greenish chlorite occurs, next the vein, highly pyritiferous and often con 

 taining considerable gold ; the power of the vein at ninety feet depth is six 

 feet, and has steadily increased from the surface down ; its strike is north 

 west by west, with a corresponding dip east and south, of fifty-five degrees. 

 The color of the vein is bluish-white, with black seams of graphite, giving 

 a ribband-like appearance in the mass ; it is highly pyritiferous, and when 

 properly roasted, crumbles easily ; some parts of the vein contain an arsen 

 ical pyrites, which has an injurious effect in the reducing process, by pre 

 venting perfect amalgamation ; this is caused by roasting the ores in con 

 tact with charcoal which should not be practised in these varieties of ores. 



SPRING HILL MINE. 



This mine is located on Amadore Creek, at the east end of the town and 

 one mile north of the preceding mine. The company commenced operations 

 on this sett in 1851, and have continued uninterrupted since that time ; it is 

 located on the same vein as the former, and crops out to the height of 530 

 feet on the highest point of the hill between Jones, Davis & Co. 



Two inclined shafts have been sunk on the vein to about 75 feet below 

 the bed of the creek, at which point the sett has a power of six feet ; in its 

 general character it differs in no wise from the mine one mile south, except 

 in the disposition of investing rocks. At Spring Hill the graphic slates 



