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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 211

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 211
llel with the first, as shown at h, Fig. 212. These hollowblows cause the sides of the flutes to slide into one another, almostas when two packs of cards, placed like the ridge of a house, pene-trate into each other and sink down flat: in a manner somewhat re-sembling that by which the original and… … f h RAISING HEMISPHERES. 207 If, however, the puckers of a large globe were entirely removed byhollow blows, the central lines of the flutes would become thickened,and therefore solid blows are mingled with them, or rather the oneblow partakes of the two natures. Thus from the curvature and…

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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