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CENTRAL ELECTRICAL STATIONS.

NET BOOK.-This book is supplied to the

Trade on terms which will not allow of Discount

to the Public.

CHARLES GRIFFIN & CO., LTD.

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Works suitable for Municipal and County Engineers.

FOURTEENTH EDITION, REVISED AND ENLARGED.
With Numerous Diagrams. Pocket Size. Leather, Ss. 6d.

A POCKET-BOOK

OF

ELECTRICAL RULES AND TABLES

FOR THE USE OF ELECTRICIANS AND ENGINEERS.

BY JOHN MUNRO, C.E., AND PROF. JAMIESON, M.INST.C.E., F.R.S.E.

GENERAL CONTENTS.

Units of Measurement.-Measures. -Testing.- Conductors.-Dielectrics.-Submarine Cables.-Telegraphy.-Electro-Chemistry.-Electro-Metallurgy.-Batteries.-Dynamos and Motors.-Trans

formers.-Electric Lighting.-Miscellaneous.-Logarithms.-Appendices.

"WONDERFULLY PERFECT.

Worthy of the highest commendation we can give it."—

Electrician.

GAS MANUFACTURE (THE CHEMISTRY OF). A Handbook on the Production, Purification, and Testing of Illuminating Gas, and the Assay of the Bye-Product of Gas Manufacture. By W. J. A. BUTTERFIELD, M.A., F.I.C., F.C.S. With numerous Illustrations. Handsome Cloth. SECOND EDITION, Revised and Enlarged. 10s. 6d. "Well deserving a place in every gas engineering library."―Journal of Gas Lighting.

SEWAGE DISPOSAL WORKS: A Guide to the Construction of Works for the Prevention of the Pollution by Sewage of Rivers and Estuaries. By W. SANTO CRIMP, M. Inst.C.E., F.G.S. SECOND EDITION, Revised and Enlarged. Large Svo, Handsome Cloth. With 37 Plates. Price 30s.

"The MOST COMPLETE AND BEST TREATISE on the subject which has appeared in our language."Edinburgh Medical Journal.

With some

CALCAREOUS CEMENTS: Their Nature, Preparation, and Uses.

Remarks upon Cement Testing. By GILBERT REDGRAVE, Assoc. Inst.C.E. Large Crown 8vo. With Illustrations, Analytical Data, and Appendices on Costs, etc. 88. 6d. "Invaluable to student, architect, and engineer."-Building News.

ROAD MAKING AND MAINTENANCE: A Practical Treatise for Engineers, Surveyors, and others. With Historical Sketch of Ancient and Modern Practice. By THOMAS AITKEN, Assoc. M. Inst.C.E., M.Assoc. Mun. and Co. Engrs., M.San. Inst., Surveyor to the County Council of Fife, Cupar Division. With numerous Plates, Diagrams, and Illustrations, 21s. "Should be on the reference shelf of EVERY MUNICIPAL AND COUNTY ENGINEER in the United Kingdom.". "-The Surveyor.

LIGHT RAILWAYS AT HOME AND ABROAD. By WILLIAM HENRY COLE, M.Inst.C.E., late Deputy Manager, North-Western Railway, India. Large 8vo, Handsome Cloth, Plates and Illustrations. 16s.

"Will remain for some time yet a Standard Work in everything relating to Light Railways."-The Engineer.

PRACTICAL SANITATION: A Handbook for Sanitary Inspectors and others interested in Sanitation. By GEO. REID, M.D., D.P.H., Fellow of the Sanitary Institute, Medical Officer, Staffordshire County Council. With Appendix on Sanitary Law, by Herbert Manley, M.A., M.B., D.P.H. SEVENTH EDITION. Cloth, 6s.

"A HANDBOOK useful to SANITARY INSPECTORS, and ALL interested in Sanitary matters."— Sanitary Record.

SANITARY ENGINEERING: A Practical Manual of Town Drainage, and Sewage and Refuse Disposal. By FRANCIS WOOD, A.M. Inst.C.E., F.G.S. Fully Illustrated. With Frontispiece, several Plates, and over 250 Illustrations.

In Large 8vo. Handsome Cloth. Profusely Illustrated. 21s.

THE PRINCIPLES AND CONSTRUCTION OF PUMPING MACHINERY.

(STEAM AND WATER PRESSURE.)

With Practical Illustrations of Engines and Pumps applied to Mining, Town Water Supply, Drainage of Land, etc., also Economy, and Efficiency Trials of Pumping Machinery.

By HENRY DAVEY, Member of the Institution of Civil Engineers, Member of the Institution of Mechanical Engineers, F.G.S., etc.

"The BEST and most PRACTICAL treatise yet published."-Mining Journal. LONDON: CHARLES CRIFFIN & CO., LIMITED, EXETER STREET, STRAND.

DESIGN, ORGANISATION, AND MANAGEMENT.

THEIR

3

CHARLES HENRY WORDINGHAM, A.K.C.,

=
MEMBER OF THE INSTITUTION OF CIVIL ENGINEERS; MEMBER OF THE INSTITUTION OF MECHANICAL
ENGINEERS; EX-MEMBER OF COUNCIL OF THE INSTITUTION OF ELECTRICAL ENGINEERS;

PAST PRESIDENT OF THE MUNICIPAL ELECTRICAL ASSOCIATION; MEMBER OF

THE AMERICAN INSTITUTE OF ELECTRICAL ENGINEERS, ETC., ETC.;
CITY ELECTRICAL AND TRAMWAYS ENGINEER, MANCHESTER.

CHAR

BY

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COMPAN

1820

LIMITED

ANYO

LONDON:
CHARLES GRIFFIN AND COMPANY, LIMITED,
EXETER STREET, STRAND.

1901.

[All Rights Reserved.]

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PREFACE.

THE literature dealing with Central Station practice is, at the present time, exceedingly limited, but that relating to many of its branches is altogether as extensive and complete, notably that dealing with the steam engine, the dynamo machine, steam boilers, and many other subjects. At least as exhaustive in treatment are the text-books dealing with the abstract sciences underlying these machines and appliances, as thermodynamics, mechanics, electrical theory.

A complete treatise on Central Station work would involve the production of a whole library of many volumes, for no field of engineering practice involves more varied and numerous branches of science, pure and applied, and to attempt to cover adequately in a single book the whole of the ground necessary for the complete exposition of the subject would be a task as futile as it would be absurd to undertake.

Recognising these facts, the Author has attempted in the present work to describe those problems which arise in the practical operation of Central Stations, whether of a scientific, an engineering, or a commercial nature, and to indicate the solution which his own experience, or that of other engineers similarly placed, has dictated. He has endeavoured to avoid more than a reference to those matters which can be found so fully and so ably treated in existing text-books and treatises, and to elaborate and treat fully those subjects which, though perhaps familiar to Central Station engineers, are not, to his knowledge, to be found readily, if at all, in any book. This will explain what might otherwise be considered the want of due proportion in the amount of space devoted to the various items considered with reference to their relative importance. For example, more attention may be given to the details of the jointing

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