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 241
of which is from a quarterto one inch diameter; this must be plentifully supplied with oil ; theblowpipe in such cases is selected with a large aperture; it is blownvigorously, and held a little distant from the flame, so as to spreadit in a broad stream of light, extending over a large surface of… … Fig. 244 is an arrangement, the use of which is attended withno fatigue to the operator. A stream of air from a pair of bellowsdirects a gas flame through a trough or shoot, the third of a cylin-drical tube placed at a small angle below the flame. Instead of acharcoal support, they employ a wooden…
Metal-work · Electrometallurgy · Metallurgy
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