ORE TREATMENT, ETC. 



SECOND EDITION, Revised Throughout. In Medium 8vo. With Numerous 

 Plates, Maps, and Illustrations. Pp. i-xxiv + 460. 21s. net. 



CYANIDING GOLD & SILVER ORES. 



A Practical Treatise on the Cyanide Process; its Application, 

 Methods of Working, Design and Construction of 



Plant, and Costs. 



BY H. FORBES JULIAN, 

 AND EDGAR SMART, A.M.I.O.E., 



Civil an'l Metallurgical Engineer. 



CONTENTS. Early History of the Cyanide Process. Preliminary Investigations. 

 Crushing. Weighing and Measuring. Percolation and Leaching. Principles involved 

 In Dissolution and Precipitation of Metals. Dissolution of the Gold and Silver. Tem- 

 perature Efiects. Absorption of Air by Solutions. Action of Various Cyanide Solutions. 



Sources of Loss of Cyanide. Precipitation. Precipitation by Zinc. Electrical Pre- 

 cipitation. Other Methods of Precipitation. Cleaning-up. Refining, and Smelting. 

 Applications of the Cyanide Process. Double Treatment. Direct Treatment of Dry 

 Crushed Ore. Crushing with Cyanide Solution. Slimes. Dissolving the Gold and Silver 

 in Slimes. Extraction by Successive Washings. Agitation and Natural Settlement. 

 Filter Presses. Vats. Essential Parts of a Cyanide Plant (Construction). Piping, 

 Cocks, Launders, and Buildings. Handling Material. Ropes and Gears for Haulage. 



Belt Conveyors. Pumps. Spitzlutte and Spitzkasten. Cost of Plant. Cost of 

 Treatment. Complete Plants. Roasting. INDEX, 



" A handsome volume of 400 pages which will be a valuable book of reference for all 

 associated with the process." Mining Journal. 



In Handsome Cloth. With Portrait and Several Plates. 

 Pp. i-xii + 310. 6s. net. 



MEMORIALS OF HENRY FORBES JULIAN 



(who perished in the "Titanic" Disaster). 

 BY HESTER JULIAN, 



" A faithful record of the life of a righteous man, whose memory will remain fragrant." 

 Mining World. 



FIFTH ENGLISH EDITION. In Large Crown 8vo. With 22 Plates and 

 many Illustrations in the Text. Handsome Cloth. Pp. i-xiv + 347. 

 8s. 6d. net. 



THE CYANIDE PROCESS OF GOLD EXTRACTION. 



A Text-Booh for the Use of Metallurgists and Students at 



Schools of Mines, dc. 

 BY JAMES PARK, F.G.S., M.lNST.M.M., 



Professor of Mining and Director of the Otago University School of Mines ; late Director 



Thames School of Mines, and Geological Surveyor and Mining Geologist 



to the Government of New Zealand. 



Thoroughly Revised and Greatly Enlarged. With additional details 



concerning the Siemens-Halske and other recent processes. 

 CONTENTS. The McArthur-Forrest Process. Chemistry of the Process. Laboratory 

 Experiments. Control, Testing, and Analysis of Solutions. Appliances and Plant for 

 Cyanide Extraction. Actual Extraction by Cyanide. Production and Treatment of 

 Slimes. Cyanide Treatment of Concentrates. Leaching by Agitation. Zinc Precipi- 

 tation and Treatment of Gold Slimes. Application of the Process in Different Countries. 

 The Siemens-Halske Process. Other Cyanide Processes. Antidotes for Cyanide Poison- 

 ing. INDEX. 



" Deserves to be ranked as amongst the BEST OF EXISTING iRKiTiST.p." Mining Journal. 



LONDON : CHARLES GRIFFIN & CO., LTD., EXETER STREET, STRAND. 



