. Popular electricity magazine in plain English. Disabled U. S. Battleship, Vermont, indrydock, showing the starboard propellerextending about fifteen feet further thanthe port propeller. This caused a badleak, at the point where the water is hereshown running out, resulting in a hurriedwireless call for help. This tunnel borer eats its way throughrock like a giant mechanical mole. A hugesteel engine, eighteen feet long is equippedwith fifteen powerful rock cutting pneu-matic hammers which strike 1,030 blowsper minute, with 25 pound hammers. Itgoes tearing through a rock like an excitedterrier
. Popular electricity magazine in plain English. Disabled U. S. Battleship, Vermont, indrydock, showing the starboard propellerextending about fifteen feet further thanthe port propeller. This caused a badleak, at the point where the water is hereshown running out, resulting in a hurriedwireless call for help. This tunnel borer eats its way throughrock like a giant mechanical mole. A hugesteel engine, eighteen feet long is equippedwith fifteen powerful rock cutting pneu-matic hammers which strike 1,030 blowsper minute, with 25 pound hammers. Itgoes tearing through a rock like an excitedterrier digging his way under the cornerof a rodent infested barn. A revolvingdisk, eight feet in diameter, carries thehammers up to the surface attacked andkeeps them up to their work. The machineis so constructed that the cutting toolswork only when they are up against therock, each tool being cut off automaticallywhen its share of the work is done, allow-ing those with harder work to do to catch. PHOTOPRESS, LONDON, E. C. A successful attempt made in England to drive abarge by means of an air propeller. A speed of fivemiles an hour was obtained. Amongst others inter-ested was an old barge horse. THE WORLDS PICTURE GALLERY 1257
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectelectri, bookyear1912
