Canadian mining journal January-June 1905 . nd 40 ft. long. The cir-culating water is forced to the top by means of a single actingWorthington, triplex, power pump belted direct from the mainshaft of the compressor. The water flows in thin layers overthe shutters of the tower, and in so doing, presents a verylarge superficial area to the direct cooling contact of the the cooling tower, the water returns by gravity to a set-tling tank, from which it is again handled through the conden-ser and around the same cycle by means of the pump. Thecondenser is of the Wheeler Admiralty surface t
Canadian mining journal January-June 1905 . nd 40 ft. long. The cir-culating water is forced to the top by means of a single actingWorthington, triplex, power pump belted direct from the mainshaft of the compressor. The water flows in thin layers overthe shutters of the tower, and in so doing, presents a verylarge superficial area to the direct cooling contact of the the cooling tower, the water returns by gravity to a set-tling tank, from which it is again handled through the conden-ser and around the same cycle by means of the pump. Thecondenser is of the Wheeler Admiralty surface type. AllCentre Star and War Eagle compressors discharge into a com-mon system so that any or all compressors can be used in the] unning of either mine. Prospecting.—Prospecting and development were startedin the usual manner on the Centre Star Claim. The veins wereexposed by surface stripping in several places and prospectingshafts were sunk on the veins. Two tunnels were run in onthe ore, and from these tunnels, prospecting proceeded by. Cooling Tower. means of crosscuts, drifts, winzes and raises; when it was con-sidered that the mine was sufficiently proven, the main shaftwas sunk. Work on this shaft proceeded at three differentpoints simultaneously, viz.: sinking from the surface, raisingfrom the second level, and sinking from the second level; themine is now worked entirely through this main shaft. Thecollar of the shaft is 3,688 feet above sea level. The shaft hasa dip of 70 deg. and its direction is N. 38 deg. 49 min. are three compartments, two of which are used fcrskips, while the third is used for a man-way and for the venti-lation and compressed air pipes. Each compartment is fivefeet square, inside measurement. From this shaft eight levelsare worked, varying from 125 feet to 175 feet apart on theslope. At each level a large station is blasted out so as to handlethe ore into the skips through large pockets. These are madeso that hy opening a gate at the bot
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectminesandmineralresou
