The practical metal-worker's assistant : containing the arts of working all metals and alloys, forging of iron and steel, hardening and tempering, melting and mixing, casting and founding, works in sheet metal, the processes dependent on the ductility of the metals, soldering, and the most improved processes, and tools employed by metal-workers, with the application of the art of electro-metallurgy to manufacturing processes : collected from original sources, and from the works of Holtzapffel, Bergeron, Leupold, Plumier, Napier, and others ... (1851)
Byrne, Oliver · Philadelphia : H.C. Baird · leaf 287
tween little clamps or vices around its four edges, andthen stretched by appropriate screws and slides with which the ap-paratus is furnished, and the same mechanism prevents the metalfrom rising, and therefore fulfils the office of the puller-off commonlyused with punches. The construction of the… … it is said as many as six or seven hundred holes have been insertedin the length of six inches, which, considering the intervening spacesto be half as wide as the diameter of the holes, would make the latterof the minute size of only six thousandths of an inch diameter. Suchfinely perforated metal…
Metal-work · Electrometallurgy · Metallurgy
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