Bulletin No. 5. San Francisco, October, 1894. The Cyanide Process: Its Practical Application and Economical Results.

Langue : anglais

Edité par State Office, A. J. Johnston, Supt. State Printing, Sacramento, CA, 1894

Vendeur : Barry Cassidy Rare Books, Sacramento, CA, Etats-UnisBarry Cassidy Rare Books

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A propos de cet article

Original publisher's dark brown cloth binding with gilt lettering on front cover. No lettering on spine. 6" x 9." 140 pages, complete. Black-and-white illustrations and diagrams, complete. Also included are data tables and Prefaces to the First, Second, and Third Editions. Pages are very clean and intact except for light age toning, a former owner's ink signature on front free endpaper, and a small bookseller's ticket tipped in on front pastedown. Covers are very clean and intact except for moderate rubbing, faint surface scratches, slight fading along spine, and slight wear to extremities. A Very Good copy. This is a report about the cyanide process and its application for extracting gold and silver from their ores. The cyanide process works by dissolving the gold or silver into a solution. Authored by Dr. A. Scheidel. Issued by the California State Mining Bureau. J. J. Crawford is credited as State Mineralogist. The following are the titles of the sections: "History of the process," "Scope of process," "Chemistry of process," "Percentage of extraction," "Working costs of production," "Cost of cyanide plants," "Machinery and appliances," "Laboratory work," "Danger in working the process," "Exemplification of the process," "Summary and conclusions," and "Patents" (in Appendix). The following excerpt from Page 5 explains the cyanide process in more detail: "The "cyanide process' for extracting gold and silver from ores is based on the fact that a diluted solution of potassium cyanide dissolves these metals, forming, respectively, auro-potassic cyanide and argento-potassic cyanide, from many ores, without dissolving to any material extent the other components thereof. The process consists of treating suitable ores, when finely divided, with a weak solution of potassium cyanide, either by allowing the solution to percolate through the ore or by agitating a mixture of the ore and solution. This part of the operation being completed, the solution is separated from the solid material and the gold and silver are precipitated in metallic form. This process for the extraction of gold and silver is comparatively old in its principle, but modern in its technical application. During the last four years it has been introduced into almost every gold field, and upward of $14,000,000 in gold and silver have been recovered by the process, which demonstrates beyond a doubt that it is one of the most important additions to the wet methods of gold and silver metallurgy.". …

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Détails bibliographiques

Titre
Bulletin No. 5. San Francisco, October, 1894. The Cyanide Process: Its Practical Application and Economical Results.
Auteur
Scheidel, A.; California State Mining Bureau; Crawford, J. J.
Éditeur
State Office, A. J. Johnston, Supt. State Printing, Sacramento, CA
Année de publication
1894
État de l'article
Very Good
Reliure
Hardcover
Langue
anglais
Catalogues du vendeur
Science and Technology, U.S. History, Western Americana

Barry Cassidy Rare Books

Sacramento, CA, Etats-Unis

Vendeur avec une évaluation de 5 étoiles

Vendeur AbeBooks depuis 27 mai 2013

Frais d'expédition à l'intérieur de ce pays : Etats-Unis

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Barry Cassidy Rare Books

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