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 54
effective, on the upper and under surfaces of theone rib at the^ same time. The drift serves as a temporary anvil;the other rib is completed in the same manner, and the work isfinally closed to its true width upon the anvil, the drift still lying inthe mortise. When a thick lump is wanted at the… … A piece with three tails, such as Fig. 47, is made from a largesquare bar; an elliptical hole is first punched through the bar, andthe remainder is split with a chisel, as in Fig. 48, the work at thetime being laid upon a soft iron cutting plate in order to shield thechisel from being driven…
Metal-work · Electrometallurgy · Metallurgy
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