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Show Ocean as Motive Power j A writer In the Paris Revue dea Deux Monde,, M. Oaston Cadoux, haa drawn a fancy picture of that happy time when London, Paris and Ilorlln will be lighted and warmed by electric, energy dorlvod from the sea. In thnso economlo duya, sea mills will skirt tho shore; they will convert the rise and fall of tbe tides Into electricity, which wires will conduct to the capital olt-les olt-les to do work, to Illuminate and to warm. No moru miners, wo may aup poso, pursuing their dangerous vocations voca-tions under ground, and no moro gaa lights polluting tho air wo breathe, and smoke-liuleii I.ondon fogs will have ceaaod forover. As the moon does In a single tldo, on but a short stretch of coast line, moro work than all our steam otiglncs, hero Is a limitless lim-itless supply of enorgy. The Idea Is charming, cot the least delightful part of It being tho satisfaction of yoking tho old satellite to our muchliiory and making her run our trains and drive our factories! Hitherto the least available natural source of electricity haa been the sea. - - ftnglnocrs find more difficulties In the way than occur to dreamers. Lord Kelvin showed, threo-and twenty yours ago, say, tho Iximlon Telegraph, how hard It would bo to got any power pow-er economically out of tha rise aud fall of the tides on tho seashore. Ten, or In some cases a hundred, times as much might bo done with a tidal rlvor. Tbe rise ur.d full of the tides betwocn Qravosend and London would rcpro-seut rcpro-seut an enormous amount of power; but It so happens that the Thames la required for other purposes. Mr. Bilthorlanil, In that Ingenious work "Twentieth Century Inventions," calculates cal-culates that the wavoa of tbe would yield In a few seconds aa much powor aa a tidal force olovatlng and doprosalng the water levol, aay, eight foot, would do In as aa many hours. The Infant born yesterday will be a very old man before he seea London lighted and warmed, to aay nothing of othor little requirements fulfilled by the power of marine tides, or currents cur-rents or wavea. |