THE "WESTMINSTER" SERIES 
Goal. By James Tonge, M.I.M.E., F.G.S., etc. (Lecturer 
on Mining at Victoria University, Manchester). With 
46 Illustrations, many of them showing the Fossils found 
in the Coal Measures. 
List of Contents : History. Occurrence. Mode of Formation 
of Coal Seams. Fossils of the Coal Measures. Botany of the 
Coal-Measure Plants. Coalfields of the British Isles. Foreign 
Coalfields. The Classification of Coals. The Valuation of Coal. 
Foreign Coals and their Values. Uses of Coal. The Production 
of Heat from Coal. Waste of Coal. The Preparation of Coal 
for the Market. Coaling Stations of the World. Index. 
This book on a momentous subject is provided for the general 
reader who wishes accurate knowledge of Coal, its origin, position 
and extent, and its economical utilization and application. 
Iron and SteeL By J. H. Stansbie, B.Sc. (Lond.), F.I.C. 
With 86 Illustrations. 
List of Contents : Introductory. Iron Ores. Combustible and 
other materials used in Iron and Steel Manufacture. Primitive 
Methods of Iron and Steel Production. Pig Iron and its Manu- 
facture. The Refining of Pig Iron in Small Charges. Crucible 
and Weld Steel. The Bessemer Process. The Open Hearth 
Process. Mechanical Treatment of Iron and Steel. Physical 
and Mechanical Properties of Iron and Steel. Iron and Steel 
under the Microscope*. Heat Treatment of Iron and Steel. Elec- 
tric Smelting. Special Steels. Index. 
The aim of this book is to give a comprehensive view of the modern 
aspects of iron and steel, together with a sufficient account of its his- 
tory to enable the reader to follow its march of progress. The methods 
of producing varieties of the metal suitable to the requirements of 
the engineer, foundryman and mechanician are described so that the 
worker may learn the history of the material he is handling. 
Natural Sources of Power. By Robert S. Ball, B.Sc, 
A.M.Inst. C.E. With 104 Diagrams and Illustrations. 
Contents : Preface. Units with Metric Equivalents and Abbre- 
viations. Length and Distance. Surface and Area. Volumes. 
Weights or 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 Turbine. 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. Con- 
structional Details. Power of Modern Windmills. Appendices 
A, B,C Index. 
Two departments of Engineering and their applications to industry 
form the subject of this volume : the " natural " sources of water 
( 2 ) 
