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Scientific American, Vol. 28, No. 6 (February 1873) (1873)

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An illustration from Scientific American, Vol. 28, No. 6 (February 1873), 1873, leaf 0
oes not exceed 5 to 8 feet so that both the fulcrums of the upper plate rest in corres- This ingenious little device will doubtless save many of per mile, for 20 or 30 miles, the joints of the western are ponding recesses in the sole plate, in which position the self-inflicted cuts and bruises due… … break the circuit and give an alarm. handle of the adjusting screw is turned in one direction, the »-<•»-«. heel end of the upper plate is depressed and rocks on the hatchets in inexperienced hands. It is a kindling wood spMt- rear fulcrum, which causes the toe end of the plates to ex- The number…

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