Electro-metallurgy Practically TreatedD. Van Nostrand, 1879 - 195 стор. |
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added alloy ammonia applied attached bath Bath brick battery battery power become boiling brassing solution Britannia metal bronze burnisher carbonate of potassa caustic caustic soda chloride clean cold water colour copper element copper wire cyanide of potassium dilute dipped dissolved distilled water edge electricity electro electro-brassing electro-deposition electro-plating electrotype employed Florence flask gallon gilding gilt gold solution gutta-percha heat hot water hydrochloric acid immersed liquid ammonia medal melted mercury mixture mould nickel nitrate nitrate of silver nitric acid obtained operation ounces oxide pickle piece plaster plate platinum plumbago porous cell potash poured precipitate purpose quantity readily receive the deposit removed render rubbed sal-ammoniac scratch-brushed sheet copper soda soft brush solder solu solution of cyanide solution of sulphate steel strip strong solution sufficient sulphate sulphate of copper sulphate of zinc sulphuric acid surface of anode take place tion varnish vessel washed zinc zine
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Сторінка 24 - to the thickness or height of which must be the depth on the block, seeing that the latter is in fact (to simplify the matter) a cast or reverse of the former. But if this composition were spread on the plate as thickly as required for this purpose, it would be impossible for the artist to put
Сторінка 25 - another piece of metal to strengthen it, and then mounted on a piece of wood to bring it to the height of the printer's type. This completes the process, and the glyphographic block is now ready for the press. "It should, however, have been stated previously,
Сторінка 57 - deposit the gold per se; otherwise the deposit will take place so rapidly that the gold will peel off when being burnished, or even scratch-brushed. When iron or steel goods are to be gilt, they should be first rendered free from grease, by being immersed in a solution of caustic soda or potassa ; they
Сторінка 1 - Edition. Revised and Enlarged. 8vo. Illustrated. Cloth. $3.50. A TREATISE ON THE RICHARDS STEAM-ENGINE INDICATOR,—and the Development and Application of Force in the Steam-Engine. By CHARLES T. PORTER. McCulloch's Theory of Heat. 8vo. Cloth. $3.50. A TREATISE ON THE MECHANICAL THEORY OP HEAT, AND ITS APPLICATIONS TO THE STEAM-ENGINE. By Prof. RS McCuLLOCH, of the Washington and Lee University, Lexington, Va. Van Buren's Formulas. 8vo. Cloth. $2.00. INVESTIGATIONS
Сторінка 23 - a description of which process we give herewith :— " A piece of ordinary copper plate, such as is used for engraving, is stained black on one side, over which is spread a very thin layer of