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-3- <br />The metals are p,•old, silver and lead. A11 of the vein filling <br />is concentration ores, with an average of ~30. per ton, The <br />production is about 7009 tons per month, <br />SL~RFA.CF PY AUNT. <br />The surface plant consists of 1-100 ft,P, and 1-?00 H.P. and <br />I-300 H,P, Air Compressors are Zngersoll Hand. These are statiori- <br />ed about 100 ft, from the entrance of tunnel in a frame building, <br />50•ft x 75 ft,~Tha other buildings are a machine shop, boarding h <br />house, and stable: and tram terminal. <br />• ' E °X P L 0 S I V N 3, <br /> <br />Du Pont, 40~e Powder, Imported In soioid Z. b, fuse; 'S-x caps <br />and wooden tamping bars are used. A'xplosives 1n excess of one da~•'s <br />supply are not stored urnierpround.~ <br />The averap,•e amount of explosives kept in storage is 5000 <br />lbs. This is kept in a frame, iron covered, map;~zine situate <br />about 21'LO ft. west of the portal of the tunnel, and used for this <br />purpose only. Oils, candles and other combustibles are stored in <br />the tram terminal. <br />The device for,thawin,~ powder is a steam heated house. <br />HiNING ~ btINEMETHODS. <br />The main. opening .is across cut tunnel 2200 ft, in length <br />where it taps the Came Bird vein. Prom this point of intersection <br />,the tunnel is driven on the vain both wags to their end lines, <br />Ail vein matter is taken out .for 900 f°t, above said tunnel. <br />There are two shafts sunk AI4. l shaft is ?,000 feet west from <br />crosscut and 900 ft,. deep, praetical!v all the ore is taken out <br />above the fourth level of said shaft. <br />No. ~ shaft is 400 ft, east of crosscut and 300 ft, deep, <br />They are ,Still running No, 3"drift east • <br />There is a little stoping going on in No. 3 and 4 west <br />The method of ore extraction is overhand, stoping and drift <br />ing with air drills, Ingersoll, ftammer and Piston Drills are use, <br />The method of timbering is stulls covered with lagging, The <br />timbers are pine and spruce, prepared by hand and are sufficient <br />to secure safety, U.ndarground trammming is done by Hand and Elect- <br />xie Motors. Steel cars are used far tramming,- <br />Chutes are loaded by hand and gravity. <br />The system of ventilation is natural, <br />