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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 140

An illustration from 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, leaf 140
e a pair otpliers, the jaws of which are conjointly pierced with a hole or passageleading into a spherical cavity; the aperture is equally divided be-tween the two halves of the mould, so that in fact the division istruly upon the diametrical line both of the sphere and the runneror the largest… … 136 CASTING AND POUNDING. Figs. 79 to 82 represent the moulds for casting pewter inkstands:these moulds are a little more complex? and are each made in fourparts; the black portions represent the sections of the inkstands tobe cast. The moulds each consist of a top piece or cap t, a bottomor core…

Metal-work · Electrometallurgy · Metallurgy

Internet Archive · Getty Research Institute · Public Domain Mark 1.0. Free to use for anything.

More pictures from 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 ...

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