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Publicado por R.P. Lescohier, 1992
Librería: Books From California, Simi Valley, CA, Estados Unidos de America
Paperback. Condición: Very Good.
Publicado por Empire Mine Park Association, 1995
Librería: Books From California, Simi Valley, CA, Estados Unidos de America
Paperback. Condición: Good. Original owner's name on front cover. Some shelf wear. Pages clean.
Publicado por Empire Mine Park Association, CA, 1993
Librería: Antiques & Art, Piedmont, SD, Estados Unidos de America
SC. Condición: Very Good. 28 The Cornish pump was an outlandish device, huge, awkward, expensive, very complex but the ability to remove water from deep mines.
Publicado por Empire Mine Park Association, CA, 1993
Librería: Antiques & Art, Piedmont, SD, Estados Unidos de America
SC. Condición: Very Good. 43 Mr. J.S. MacArthur's work included efforts to increase recovery of precious metals by use of chloeine and bromine.
Publicado por Empire Mine Park Association, Nevada City, CA, 1992
Librería: S. Howlett-West Books (Member ABAA), Modesto, CA, Estados Unidos de America
Original o primera edición Ejemplar firmado
Stapled wraps. Condición: Very Good. 1st Edition; 1st Printing. B&W Illustrations; SIGNED EDITION. This book is in Very Good condition and was issued without a dust jacket. This copy has been signed by the author on the half title page. There is some extremely light bumping to the spine ends. There is a strip of color loss to front cover by the spine joint. The text pages are clean and bright. "The Pelton wheel or Pelton Turbine is an impulse-type water turbine invented by American inventor Lester Allan Pelton in the 1870s. [1][2] The Pelton wheel extracts energy from the impulse of moving water, as opposed to water's dead weight like the traditional overshot water wheel. Many earlier variations of impulse turbines existed, but they were less efficient than Pelton's design. Water leaving those wheels typically still had high speed, carrying away much of the dynamic energy brought to the wheels. Pelton's paddle geometry was designed so that when the rim ran at half the speed of the water jet, the water left the wheel with very little speed; thus his design extracted almost all of the water's impulse energy which made for a very efficient turbine. " (from Wikipedia) ; Signed by Author.
Publicado por Empire MIne Park Association, 1995
Librería: The Bookseller, Edmonton, AB, Canada
Libro
Soft cover. Condición: Near Fine. Near fine book. Illustrated with b/w photos. vii, 125 pp.
Publicado por Empire Mine Park Association, CA, 1991
Librería: Antiques & Art, Piedmont, SD, Estados Unidos de America
sc. Condición: Very Good. 43 The stamps were the key to seperation of gold from the hard rock in which it was enveloped with heavy iron or steel feet.
Publicado por Roger P. Lescohier, No Place, 1991
Librería: S. Howlett-West Books (Member ABAA), Modesto, CA, Estados Unidos de America
Original o primera edición Ejemplar firmado
Pamphlet. Condición: Very Good+. 1st Edition; 1st Printing. SIGNED EDITION. This copy of the book has been signed by the author on the introduction page. This is a small format paperback booklet with cardstock covers and a stapled spine. The booklet is in Very Good+ condition and was issued without a dust jacket. The text pages are clean and bright. "The stamp mill was the big gold machine of its day. By 1850 in California all of the rivers and streams had been picked clean of placer gold. It didn t take long for miners to follow the gold deep into the Sierra s steep valleys to snow white quartz outcroppings. They soon realized the gold trapped within these veins could produce thousands of ounces of gold and thus began hard rock or lode mining. Stamps mills were an efficient way to crush the rock into powder and thus free even fine particles of gold. Stamp Mill manufactures went into production all over California funded by east coast old money. " (from California Gold Explorers website) ; Signed by Author.
Publicado por Lescohier, Roger P., 1992
Librería: Karl Eynon Books Ltd, Tywyn, Reino Unido
Original o primera edición Ejemplar firmado
Paper Back. Condición: Very Good. First Edition. Signed by Author Signed Copy 42 pages 1st Edition; 1st Printing B&W Photographs; This pamphlet is in Near Fine condition. Heavy cardstock covers wraps with staple binding. The pamphlet and its contents are in clean, bright condition. White cardstock covers have some light, ground-in dirt / fingermarks. The text pages are clean and bright. This pamphlet discusses the history of The Empire MIne and the use of cyanide in mining gold. "The scramble for gold in the Western Sierra rivers and streams followed immediately upon the discovery of nuggets in the tailrace of Sutter"s sawmill in January 1848. It reached a peak and then diminished sharply, all within a period of three or four years.". Signed by Author.
Publicado por Grass Valley, California, U.S.A.: Empire Mine Park Association, 1995
Librería: The Warm Springs Book Company, Fremont, CA, Estados Unidos de America
Original o primera edición
Soft cover. Condición: Fine. 1st Edition. A fine copy in pictorial wraps. Probable 1st edition with no additional printings listed; Illustrated, 8vo., 106 pages plus appendix and bibliography., 0.0 0.0 0.0.
Publicado por Empire Mine Park Association, 1994
Librería: Sunny Day Books, Mayer, AZ, Estados Unidos de America
Libro
Paperback. Condición: New. Brand New! Cover has minor shelf rubbings.