Popular science monthly . 796 Popular Science MuJttJily under the village had an area of some50 square meters (about 500 sfj. ft.). Itwas a task which took the French overtwo months to accomplish, for there wereimmense difficulties encountered inthe way of avoiding enemy miningparties and transporting materialnecessary for making the work the work progressed, electric wiringwas installed for illuminating thedark recesses of the excavation. Final-ly the large cavern of the mine underthe village of Dompierre was storedfull of explosives—enough, infact, to blow the entire villageto atom
Popular science monthly . 796 Popular Science MuJttJily under the village had an area of some50 square meters (about 500 sfj. ft.). Itwas a task which took the French overtwo months to accomplish, for there wereimmense difficulties encountered inthe way of avoiding enemy miningparties and transporting materialnecessary for making the work the work progressed, electric wiringwas installed for illuminating thedark recesses of the excavation. Final-ly the large cavern of the mine underthe village of Dompierre was storedfull of explosives—enough, infact, to blow the entire villageto atoms. Electric fuses wereinstalled, from which under-ground wires led back toGeneral Headquarters. Thusthe general of the division, bypressing a small electric but-ton ten kilometers distant,blew up the German village ofDompierre. He heard thefive seconds later and knewfirst stroke of the great Picardy offensivehad been a success. A^. The paint brushsuspended withinthe oil-can holder explosionthat the To Prevent Asphaltum in Cans from is used extensivelyabout electrical apparatus and whereanyone has to do with the makingup of coils, and the like, a can of thismaterial will be found at hand. Thebrush and liquid will likewise befound in a condition that rendersthem unusable until thinned withdrier. Just an ordinary oil-canmakes a convenient holder for theliquid and brush. The handle of thebrush is inserted in the spout,as shown, where it keeps thebrush part in the liquid. Aircannot enter, hence there isno evaporation. This holderis especially useful for thehome work-shop where theasphaltum is used only occa-sionally and is kept in smalltiuantities. The brush is keptn a workable condition. soft and Making an Inductance Switch forRadio Work
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectscience, bookyear1872
