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 223
very great truth,the elasticity is also examined; this is frequently done by holdingthe opposite edges of the plate between the fingers and thumbs, andbending them at various parts. As previously explained, all theportions which are technically called tight, or those lines upon whichthe loose… … a, the whole exterior portion would require to be stretched, begin-ning from the base of the bulge: but it must be remembered theextreme edges of the plate will yield with greater facility than themore central parts, and therefore require somewhat fewer blows, asthe blows are all given as nearly as…
Metal-work · Electrometallurgy · Metallurgy
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