E/MJ : engineering and mining journal . sheets ofblotting paper, and a hot (electric) sad-iron is passed overthe upper blotter, thus causing the paraffin to be distri-buted more evenly and the surplus to be absorbed by theblotting paper. The blotters must be removed before theycool. If the wax is thick and white over any part of thedrawing or print, sponge it off with benzine. E. Drawings may be paraffined by dissolving the par-affin wax in benzine and then thoroughly painting thedrawing with this liquid or passing the drawing througha hath and hanging it up to dry. Some of the solvents mentio
E/MJ : engineering and mining journal . sheets ofblotting paper, and a hot (electric) sad-iron is passed overthe upper blotter, thus causing the paraffin to be distri-buted more evenly and the surplus to be absorbed by theblotting paper. The blotters must be removed before theycool. If the wax is thick and white over any part of thedrawing or print, sponge it off with benzine. E. Drawings may be paraffined by dissolving the par-affin wax in benzine and then thoroughly painting thedrawing with this liquid or passing the drawing througha hath and hanging it up to dry. Some of the solvents mentioned are very inflammableand even explosive, so all open lights should lie kept awayfrom them. Sometimes they affect certain people injuri-ously: accordingly, such work should he done only in awell-ventilated room, with a fan to keep fresh air moving. =ID©{tacsIhi!irs!g IDevnce At one mine a man was dispensed with and a danger-ous job eliminated by having a tool made to uncouple therope at the foot of an incline^ says I?. Z. Virgin, in. w DEVICE AUTOMATICALLY RELEASKS ROPE ATFOOT OF PLANE Coal Age, Nov. 11. 1916. The device is fastened tothe rear end of the trip. It pulls the pin, detaches therope, and the trip runs onto the siding. The overhead knocker is placed at the point wherethe rope is to be attached to the loaded trips to makethe return journey up the American Lithographic Stone—The only American com-pany producing lithographic limestone in commercial quanti-ties is the Kentucky Lithograph Stone Co. of Brandenburg, companys quarries are producing a stone rivaling inquality the Baravian product which was used in Americaalmost exclusively up to the outbreak of the European of the recently developed industries requiring quantitiesof stone is the manufacture of colored posters for movingpicture plays, a business which has attained large propor-tions. Doremher !», 1916 ENGINEERING AND MINING JOURNAL 1021 ijiiii Him n mi DetoiEs of MMMmi^ aimdl Sm
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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectmineralindustries
