Scheidel a (79 risultati)

Condizione: As New. Unread book in perfect condition.

Condizione: New.

PAP. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

PAP. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

Condizione: New.

Condizione: New.

PAP. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

PAP. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

Paperback. Condizione: New. New copy - Usually dispatched within 4 working days.

Condizione: Fair. This is an ex-library book and may have the usual library/used-book markings inside. .This book has hardback covers. In fair condition, suitable as a study copy. Please note the Image in this listing is a stock photo and may not match the covers of the actual item,1250grams, ISBN.

HRD. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

HRD. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

HRD. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

Condizione: As New. Unread book in perfect condition.

Condizione: New.

HRD. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

Hardcover. Condizione: Very Good. 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.".…

Zeichnungen von G.F. Duncan, VI, 159 S. Geb. Versand aus Deutschland / We dispatch from Germany via Air Mail. Einband bestoßen, daher Mängelexemplar gestempelt, sonst sehr guter Zustand. Imperfect copy due to slightly bumped cover, apart from this in very good condition. Stamped. Gestempelt. Sprache: Deutsch. …

Condizione: New. KlappentextrnrnUnlike some other reproductions of classic texts (1) We have not used OCR(Optical Character Recognition), as this leads to bad quality books with introduced typos. (2) In books where there are images such as portraits, maps, sketc.

Paperback. Condizione: New. Print on Demand. This book showcases the history and practical applications of the cyanide process for extracting gold and silver from ores, detailing the process's development from its roots in laboratory experiments to its implementation in gold fields and mines worldwide. The author, a prominent metallurgist, draws on his experience in New Zealand, the United States, and South Africa to provide insights into the chemistry, methods, and challenges of cyanide treatment, including agitation and percolation processes. The book explores the process's advantages and disadvantages, examining its effectiveness on various ore types and discussing strategies to optimize extraction rates and minimize cyanide consumption. The author also delves into the history of cyanide patents, tracing the evolution of the process through the contributions of inventors and scientists. This book offers a comprehensive exploration of the cyanide process, providing valuable information for metallurgists, miners, and anyone interested in the history and application of gold and silver extraction techniques. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item.…

Paperback. Condizione: New. Print on Demand. This book presents a comprehensive analysis of the cyanide process, a method developed in the 19th century for extracting gold and silver from ores. The author, a prominent expert in the field, traces the history of the process from its origins to its widespread adoption in the mining industry, particularly in gold-rich regions such as South Africa and Australia. The book delves into the chemistry behind the process and provides a detailed examination of the various methods used to apply it, including agitation and percolation. It also discusses the challenges and complexities encountered in treating different types of ores and concentrates, offering practical insights and solutions. The book concludes by highlighting the significance of the cyanide process in revolutionizing gold and silver extraction, making it a valuable resource for mining professionals, historians, and anyone interested in the history and application of metallurgical techniques. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item.…

Condizione: New. Print on Demand.

Taschenbuch. Condizione: Neu. The Conquest of the river Plate | 1535-1555 | Ulrich Scheidel (u. a.) | Taschenbuch | 332 S. | Englisch | 2018 | hansebooks | EAN 9783337667931 | Verantwortliche Person für die EU: Hansebooks GmbH, Trakehner Weg 52, 22844 Norderstedt, gb[at]hansebooks[dot]com | Anbieter: preigu.…

Softcover. Condizione: Sehr gut. 58 S.; Original-Karton; 8°. Sehr gutes Exemplar.

Taschenbuch. Condizione: Neu. The Ancient Economy | Walter Scheidel (u. a.) | Taschenbuch | Einband - flex.(Paperback) | Englisch | 2002 | Taylor & Francis Ltd (Sales) | EAN 9780415941891 | Verantwortliche Person für die EU: Libri GmbH, Europaallee 1, 36244 Bad Hersfeld, gpsr[at]libri[dot]de | Anbieter: preigu.…

Hardcover. Condizione: Neu. VI, 160 S. zahlr. z.T. farb. Abb. Neu! - Versandfertig am nächsten Tag; Rechnung mit MwSt. liegt bei! Operative Techniken in der Reproduktionsmedizin sind unverzichtbarer Bestandteil des sterilitätstherapeutischen Spektrums. Dieses Buch stellt in verständlicher Weise die operativen Techniken der Reproduktionsmedizin dar. Die rekonstruktive Chirurgie des Eileiters, die operative Therapie der Endometriose, die In-vitro-Fertilisation und der Embryotransfer sowie der intratubare Gametentransfer werden von verschiedenen Autoren aus ihrer persönlichen Sicht dargestellt und gestatten einen Einblick in die Komplexität des Themas der modernen Reproduktionsmedizin. Sprache: Deutsch.…

Condizione: New. Brand New.

Condizione: good. This is a pre-loved book that shows moderate signs of wear from previous reading. You may notice creases, edge wear, or a cracked spine, but it remains in solid, readable condition. Please note: -May include library or rental stickers, stamps, or markings. -Supplemental materials e.g., CDs, access codes, inserts are not guaranteed. -Box sets may not come with the original outer box. If it does, the box will not be in perfect condition. Your satisfaction is our top priority! If you have any questions or concerns about your order, please don't hesitate to reach out. Thank you for shopping with us and supporting small businessâ"happy reading.…

Hardcover. Condizione: Very Good-. No Dust Jacket. Textured cloth gilt. Exterior cloth mottled/stained. PO name stamped several times. Text is unmarked; hinges and binding tight. Two foldout tables. ; 8vo 8" - 9" tall; 140 pages.

Condizione: New.