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Scientific American, Vol. 31, No. 12 (September 1874) (1874)

leaf 3

An illustration from Scientific American, Vol. 31, No. 12 (September 1874), 1874, leaf 3
lly certain to rise. When hard timescome, or when his employer is unfortunate and is compelledto retrench, he is the man who will not be dismissed, andwho will not lose time in seeking work, when he would, ofnecessity, be eating up his savings till he finds it. When va-cancies occur in the… … upon it, by means of which it is fastened into the spindle andbearings. Another form of cutting apparatus may be formedfrom a flat bar of steel, with saw teeth along both of its out-er edges, and so twisted that the toothed edges are formedinto spirals. By this arrangement the cutter readily…

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