ed in reference to the Waltham establishment, where a rapidly revolving tooth plows a groove, or fuirow, along the surface from end toend. The spindle then turns es on the old plan was gone.” on its axis the width of one tooth, and another groove is cut beside the first. This is repeated sixty or… … sufficiently to bring the second of the smaller cylinders with adjustment of parts is made with mathematical precision far its mounted tool into place. It, in turn, is set to spinning ; beyond the reach of unassisted sense. It is not merely ex- the rod slides forward as before, and another portion…
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![An illustration from Episodes of insect life / by Acheta Domestica, [pseud.] ;edited and revised by J.G. Wood. (1879)](https://img.insideoutlibrary.com/img/200/wellcome-wellcome_b28066340-91-1.webp)
