Chapter V: THE ELASTIC CURVE. Chapter VI.--LONG COLUMNS. Chapter

VII.--COMBINED STRESSES. Chapter VIII.--COMPOUND BARS AND BEAMS.
TABLES.

HYDRAULICS AND ITS APPLICATIONS. By A. H. GIBSON, M.Sc., Assoc.Mem.Inst.C.E., Victoria University, Manchester. 774 pages. 308 Figures. Demy 8vo. 15_s._ net.

_Engineering Times._--"This is the best book to date on the subject."

NATURAL SOURCES OF POWER. By ROBERT S. BALL, B.Sc., A.M.Inst.C.E. With 104 Diagrams and Illustrations. Extra Crown 8vo. 6_s._ net.

CONTENTS:--Preface. Units with Metric Equivalents and
Abbreviations Length and Distance. Surface and Area. Volumes.
Weights and Measures. Pressures. Linear Velocities. Angular
Velocities. Acceleration. Energy. Power. Introductory Water
Power and Methods of Measuring. Application of Water Power to
the Propulsion of Machinery. The Hydraulic Turbine. Various
Types of Turbines. Construction of Water Power Plants. Water
Power Installations. The Regulation of Turbines. Wind Pressure,
Velocity, and Methods of Measuring. The Application of Wind Power
to Industry. The Modern Windmill. Constructional Details. Power
of Modern Windmills. Appendices A, B, C. Index.

METALLURGY

MALLEABLE CAST IRON. By S. JONES PARSONS, M.E. Illustrated. Demy 8vo. 8_s._ net.

The information in this volume is thoroughly practical and
reliable, and the entire process of manufacture is clearly
explained, each stage being treated separately and in detail,
while much valuable information will be found in chapters dealing
with design, patterns, inspection, machining, supplementary
processes, and the application of the material, the use of which
has increased so enormously within the last few years that
it is now preferred to steel for many purposes. It is freely
illustrated with photographs and line drawings, and will be
invaluable to the professional man and the student.

THE PRECIOUS METALS: COMPRISING GOLD, SILVER, AND PLATINUM. By T. KIRKE ROSE, A.R.S.M., D.Sc. Extra Crown 8vo. 6_s._ net.

CONTENTS:--History of Gold--Properties of Gold--Compounds
of Gold--Alloys of Gold--Occurrence of Gold in Nature: Gold
Ores--Extraction of Gold from its Ores: Gold Washing--Treatment
of Gold Ores by Crushing and Amalgamation--Treatment of Gold
Ores by Wet Methods--Silver and its Alloys--Compounds and Ores
of Silver--The Extraction of Silver from its Ores--Refining Gold
and Silver--The Assay of Gold and Silver Ores--The Assay of Gold
and Silver Bullion--Minting--Manufacture of Gold and Silver
Wares--Platinum--Production and Consumption of the Precious
Metals.

AGRICULTURE

SOILS AND MANURES. By J. ALAN MURRAY, B.Sc. Demy 8vo. 6_s._ net.

CONTENTS:--Preface. Chapter I.--Introductory. Chapter II.--The
Origin of Soils. Chapter III.--Physical Properties of Soils.