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Triumphs and wonders of the 19th century, a volume of original, historic and descriptive writings showing the many and marvellous achievements which distinguish an hundred years of material, intellectual, social and moral progress (1901)

Boyd, James Penny, 1836-1910 · Philadelphia, A. J. Holman & co · leaf 610

An illustration from Triumphs and wonders of the 19th century, a volume of original, historic and descriptive writings showing the many and marvellous achievements which distinguish an hundred years of material, intellectual, social and moral progress, 1901, leaf 610
considerably diminished underground, —and any one who has triedto follow a mine foreman through mine workings knows the speed slackeningis slight,—a very slight swing of the arm would bring the rate of movementof the lantern up to the danger point. Another and a very unexpected factorin causing… … i i -. VV* ***». Wc SINKING, DRIFTING, AND BTOPING WITH THE INGEKSOLL-SKKGEANT DRILLS. pile of coal, draw forth his pipe and fill it, and deliberately open the gauze tolight it. As a consequence, for a time after the introduction of the safety-lamp, the number of accidents from explosions…

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