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Scientific American, Vol. 38, No. 22 (1878) (1878)

leaf 6

An illustration from Scientific American, Vol. 38, No. 22 (1878), 1878, leaf 6
ces being original and efficient. structed a transmitter on the principle shown in the engrav- improved system of Manufacturing Knife Blades, by means In a Stone Sawing Machine invented by Mr. W. Tuggey, of ing, in which A represents a metal speaking tube, having a West Rutland, Vt., the patentee… … make the course towards improved Drill Bit for drill- ing oil, salt, and artesian which it moves the one of the least resistance, and the same wells. In drilling such wells the usual practice has been to first run down a small bit steel, and in such a manner that the grain of the steel, it is…

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