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Scientific American, Vol. 56, No. 6 (1887) (1887)

leaf 4

An illustration from Scientific American, Vol. 56, No. 6 (1887), 1887, leaf 4
rriage, and is provided with two cranks, which are connected by straps with the cross head of the drill JOHNSON’S BACK BAND FOR HARNESS, shaft. The cross head is fitted to slide vertically on length to pass over the back of the horse, is riveted'a the drill carriage, and the drill shaft is… … ber inclosing the upper end of the base or sup- : —_ 0 THE INGERSOLL DUPLEX ROCK DRILLING MACHINE. port. The top plate, to which the fire box and oven IMPROVED LEAD PIPE REEL, are joined, is provided ;with a hollow ball, open at Lead pipe is usually put up on reels’ which do not collars above and…

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