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A TEXT-BOOK OF ASSAYING.

Edited by SIR W. ROBERTS-AUSTEN, K.C.B., F.R.S., D.C.L.

Fifth Edition, Thoroughly Revised and Considerably Enlarged. 18s. INTRODUCTION TO THE STUDY OF METALLURGY. By Sir W. C. ROBERTS-AUSTEN. With additional Illustrations and Micro-Photographic Plates of Different Varieties of Steel.

Fourth Edition, Thoroughly Revised and Enlarged. THE METALLURGY OF GOLD.

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By T. KIRKE ROSE, D.Sc., Assayer of the Royal Mint. Including the most recent Improvements in the Cyanide Process. With new Frontispiece and additional Illustrations.

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THE METALLURGY OF LEAD AND SILVER. By H. F. COLLINS,
Assoc. R. S. M., M. Inst.M.M.

Part I.-LEAD. With Sections on Smelting and Desilverisation, and the Assay
and Analysis of the Materials Involved.

165.

Part II. SILVER. Sources and Treatment of Ores, with Descriptions of Plant,
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Second Edition, Revised.

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THE METALLURGY OF IRON. BY THOMAS TURNER, F.I.C., Assoc. R.S.M. Professor of Metallurgy at the University of Birmingham.

Large Svo. Profusely Illustrated with Plates and Diagrams. THE METALLURGY OF STEEL. By F. W. HARBORD. the Mechanical Treatment of Steel. By J. W. HALL.

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ASSAYING. By J. J. BERINGER, F.I.C., F.C.S., and C. BERINGER, F.C.S. NINTH EDITION, Revised. With Diagrams. 10s. 6d.

GETTING GOLD. A Practical Treatise for Prospectors and MINERS. By J. C. F. JOHNSON, A.I.M.E., F.G.S., Life Member Australian Mine Managers' Association. Numerous Illustrations. SECOND EDITION. 35. 6d.

GOLD SEEKING IN SOUTH AFRICA. A Handbook of Hints for Intend4s. 6d. net. ing Explorers, Prospectors, and Settlers. By THEO. KASSNER. With a Chapter on Agriculture. Crown 8vo, Fancy Cloth Boards. Illustrated.

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THE CYANIDE PROCESS OF GOLD EXTRACTION. BY JAMES
PARK, F.G.S., M. Inst. M. M., late Geological Surveyor and Mining Geologist to
NEW EDITION, Revised and Enlarged from the last
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New Zealand Edition. With Frontispiece, Plates and Illustrations.
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PROSPECTING FOR MINERALS. A Practical Handbook. By S. HERBERT
Cox, Assoc.R.S.M., M. Inst. M.M., F.G.S., &c.
EDITION, Revised. Cloth, 5s.; Leather, 6s. 6d.
TABLES FOR QUANTITATIVE METALLURGICAL ANALYSIS
FOR LABORATORY USE. By J. JAMES MORGAN, F.C.S. Large 8vo,
strongly bound, cloth, 45.

ELECTRIC SMELTING AND REFINING.

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SECOND

By Dr. W. BORCHERS.
Translated by WALTER G. MCMILLAN, F.I.C., F.C.S., from the Second German
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MINE ACCOUNTS AND MINING BOOKKEEPING. From the ACTUAL
PRACTICE of leading Mining Companies. By JAMES G. LAWN, Assoc. R.S.M.,
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METALLURGICAL ANALYSIS AND ASSAYING: A Three Years' Course for Students. By W. A. MACLEOD, B.A., B.Sc., A.O.S.M. (N.Z.), and CHAS. WALKER, F.C.S.

Part I. Qualitative Analysis, and Preparation and Properties of Cases.

Part II. -Qualitative and Quantitative Analysis.

Part III.-Assaying, Technical Analysis (Gas, Water, Fuels,
Oils, &c.).

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

A

TEXT-BOOK OF ASSAYING:

FOR THE USE OF THOSE CONNECTED

WITH MINES.

BY

C. AND J. J. BERINGER.

"

REVISED BY

J. J. BERINGER,

ASSOC. OF THE ROYAL SCHOOL OF MINES; FELLOW OF THE CHEMICAL
SOCIETY AND OF THE INST. OF CHEMISTRY; PRINCIPAL OF

THE CAMBORNE MINING SCHOOL; AND LATE PUBLIC
ANALYST FOR THE COUNTY OF CORNWALL.

[blocks in formation]

CHARLES GRIFFIN AND COMPANY, LIMITED,

EXETER STREET, STRAND.

1906.

[All rights reserved.]

mingha

Mini

1337

776

BINING UPT,

PREFACE TO THE TENTH EDITION.

Advantage has been taken of the issue of this edition to rewrite the article on the wet methods of assaying for lead. The continued popularity of the work is a source of gratification.

CAMBORNE,
January, 1906.

155626

J. J. BERINGER.

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