The Practical Metal-worker's Assistant ...: With the Application of the Art of Electro-metallurgy to Manufacturing Processes

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H.C. Baird, 1864 - 646 páginas
 

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Página 3 - 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 Metalworkers. 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, Scoffern, Clay, Fairbairn and others.
Página 497 - ... thickness of the intervening wall of plaster of Paris, and by the coarseness or fineness of the material. I made three similar experiments, altering the texture and thickness of the plaster each time, by which I ascertained that if the...
Página 72 - ... times its original length. One of the most important facts connected with the new system of manufacturing malleable iron is that all the iron so produced will be of that quality known as charcoal iron; not that any charcoal is used in its manufacture, but because the whole of the processes following the smelting of it are conducted entirely without contact with, or the use of, any mineral fuel; the iron resulting therefrom will in consequence be perfectly...
Página 491 - Jacobi, at St. Petersburg)!, has also made a discovery which promises to be of little less importance to the arts. He has found a method — if we understand our informant rightly — of converting any line, however fine, engraved on copper, into a relief, by galvanic process.

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