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acid actual added agitation alkaline allowed amalgamation amount applied assay bottom boxes bullion carried cause cent charge concentrates consists consumption containing copper cost crushed cyanide solution cyanide treatment deep diameter dilute discharge dissolution dissolved drained dry-crushed EDITION effected excess experiments extraction extractor filter-press fine four furnace give gold Illustrated iron leaching vats lead lime loss material means metal method mill Mining necessary nitrate obtained operation oxide oxygen passing percolation pipe placed plant plates potassium practice precipitation present presses proportion pulp pump pyrites quantity roasting salt sample sands separated settle shows side silver slimes South standard strength strong solution successful sulphide sulphuric sump tailings takes tank tion tons treated treatment usual varies wash weak solution weight zinc
Page 234 - With 201 Illustrations. 6s. net. AN INTRODUCTION TO THE DESIGN OF BEAMS, GIRDERS, AND COLUMNS IN MACHINES AND STRUCTURES. With Examples in Graphic Statics. BY WILLIAM H. ATHERTON, M.Sc., MIMECH.E.
Page 234 - Iron and Coal Trades Review. In Large Crown 8vo. Cloth. Fully Illustrated. 5s. net. SUCTION GAS PLANTS. BY PROF. CA SMITH, of the East London Technical College. CONTENTS. — Introduction. — Details of Construction. — Fuel and Testing. — Application and Uses of Suction Plants.— Working the Plant.— Typical Plants.— Plants for Special Purposes.— Total HP— Effluent.— Cost of Gas Production.— The Gas Engine.— Bibliography.
Page 211 - ... long intervals. The lead which contains from 2 to 12 per cent, of gold is then smelted into bars and cupelled. The gold is deposited on the lead sheets as a thin bright yellow film which adheres firmly to the lead. The process of cupellation is too well known to need description.
Page 235 - EDITION. 12s. 6d. A MANUAL OF THE STEAM-ENGINE AND OTHER PRIME MOVERS. With a Section on GAS, OIL, and AIR ENGINES, by BRYAN DONKIN, M.Inst.CE With Folding Plates and Numerous Illustrations.
Page 240 - Lecturer on Colouring Matters in the Victoria University of Manchester. Part I. Theoretical. Part II. Practical. Part III. Analytical. " We have no hesitation in describing this treatise...
Page 235 - A MANUAL OF PETROL MOTORS AND MOTOR-CARS. Comprising the Designing, Construction, and Working of Petrol Motors. By F. STRICKLAND. GENERAL CONTENTS.— PART I.
Page 235 - Leather, 8s 6d ELECTRICAL THEORY AND THE PROBLEM OF THE UNIVERSE. By GW de TUNZELMANN, - - ....... net.