Electro-metallurgy Practically Treated

Paperback | June 26, 2012

byAlexander Watt

not yet rated|write a review
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1889 edition. Excerpt: ...reduced to the metallic state, which renders the object an excellent conductor. 144. Batteries which have a copper cylinder for the negative element, may have their quantity augmented by placing fragments of broken electrotypes at the bottom of each battery cell in close contact with the cylinder. The author has employed old rifle-caps for this purpose, placing several hundreds in each cell, by which means the quantity of the current was increased up to a certain point in proportion to the extra surface of copper thus presented. 145-Lace, net, and other similar fabrics may be coated with copper, by first dipping in melted wax. The superfluous wax must be removed by placing the net between two layers of blotting paper, and then passing a heated iron over the surface. Plumbago or bronze powder is then to be applied, and the article will be ready for the coppering bath. 146-Glass vessels may be covered with copper by varnishing or coating them with wax in the first place, and then applying plumbago, after which they are ready for the coppering bath. 147-It is a good plan to give a coating of varnish (shellac dissolved in spirit of wine, for instance) to the outer edges of electrotype moulds, to prevent the deposit of copper taking place upon those parts, but the varnish must not be too thin, nor too freely used, otherwise some of it may find its way upon the surface of the mould and thus render the impression imperfect. Grease of any kind, carefully applied, will answer the same purpose. 148-Silver bronze, as a conducting medium for electrotype moulds, may be very easily prepared as follows:--To a solution of nitrate of silver add sufficient solution of common salt to throw down all the silver in the form of chloride. Wash the precipitate several...

Pricing and Purchase Info

$28.95

Out of stock online

From the Publisher

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1889 edition. Excerpt: ...reduced to the metallic state, which renders the object an excellent conductor. 144. Batteries which have a copper cyli...

Format:PaperbackDimensions:116 pages, 9.69 × 7.44 × 0.24 inPublished:June 26, 2012Publisher:General Books LLCLanguage:English

The following ISBNs are associated with this title:

ISBN - 10:0217469388

ISBN - 13:9780217469388

Look for similar items by category:

Customer Reviews of Electro-metallurgy Practically Treated

Reviews