ae ae 
will be found to render the book still useful to the increasing numbers of those who are practically 
engaged in alternating-current work, he has sought, as far as possible, to avoid academic methods 
and keep in touch with the necessities of the student who has to deal with the subject not as a 
basis for mathematical gymnastics but with the object of acquiring practicaly usefull knowledge. 
Dr. Fleming’s manual on the Alternate,Current Transformer in Theory and Practice is 
recognised as the text book on the subject. Vol. I. which deals with ‘‘ The Induction of Electric 
Currents,” has passed through three editions, each. edition having, in its turn, passed through 
several issues. “Chis volume consists of 613 pages, and has 273 illustrations, 
Fleming—THE ALTERNATE CURRENT TRANSFORMER 
IN THEORY AND PRACTICE. By J. A. Fleming, M.A., D.Sc., F.R.S., M.R.1., 
&c., Professor of Electrical Engineering in University College, London. Third Issue. 
More than 600 pages and over 300 illustrations. Price 12s. 6d., post free; abroad, 13s. 
Vol. II. treats of The Utilisation of Induced Currents.’’ This volume has also passed 
through numerous issues, consists of about 600 pages, and has 31 illustrations. 
Fleming —-THE CENTENARY OF THE ELECTRIC CURRENT. 
1799—1899. By Prof. J. A. Fleming, F.R.S. With Illustrations of early apparatus and 
interesting Chronological Notes, In neat paper covers 1s. nett, post free 1s. 3d. Bound 
cloth 2s, nett, post free. 
Fleming—-THE ELECTRONIC THEORY OF ELECTRICITY. 
By Prof. J. A. Fleming, M.A., D.Sc., F.R.S. Price 1s. 6d. post free. 
Extract from the Author.—In this sketch of the Electronic Theory the author has made 
no attempt to present a detailed account of discoveries in their historical order, or to con- 
nect them especially with their authors. The object has been to show the evolution. of the idea 
that electricity is atomic in structure, and that thus these atoms of electricity called electrons 
attach themselves to material atoms and are separable from them. Lorentz, Helmholtz, Thomson 
and others have shown that such a conception jof atomic structure enables us to explain many 
electro-optic phenomena which are inexplicable on any other theory. The Electronic Theory of 
Electricity, which is an expansion of an idea originally due to Weber, does not invalidate the 
ideas which lie at the base of Maxwell’s theory that electric and magnetic effects are due to the 
strains and stresses in the zther, but supplements them by a new concepiian thet ot the electron 
or electric particle as the thing which is moved by electric force, and which, in turn, gives rise to 
magnetic force as it moves, All the facts of electricity and magnetism are capable of being 
restated in the terms of the idea. : 
Geipel and Kilgour—A POCKET-BOOK OF ELECTRICAL 
ENGINEERING FORMULA, &c. By W.Geipel and H. Kilgour. 800pages. 7s. 6d. 
nett, post free, at home or abroad, 7s. gd, 
With the extension of all branches of Electrical Engineering (and particularly the heavier 
branches), the need of a publication of the Pocket-Book style dealing practically therewith 
increases ; for while there are many such books referring to Mechanical Engineering, and several 
dealing almost exclusively with the lighter branches of electrical work, none of these suffice for the 
porpuses of the numerous body of Electrical Engineers engaged in the application of electricity to 
ighting, Traction, Transmission of Power, Metallurgy, and'Chemical Manufacturing. It is to 
supply this real want that this most comprehensive book has been prepared. 
Compiled to some extent on thelines of other pocket-books, the rules and formulz in general 
use among Electricians and Electrical Engineers all over the world have been supplemented by 
brief and, it is hoped, clear descriptions of the various subjects treated, as well as by concise 
articles and hints on the construction and management of various plant and machinery. 
No pains have been spared in compiling the various sections,to bring the book thorough]. 
up to date ; and while much original matter is given, that which is not original has been caretully 
selected, and, where necessary, corrected. ere authorities differ, as far as practicable a mean 
has been taken, the different formula being quoted for guidance. 
Gore—ELECTRO-CHEMISTRY. By George Gore, LL.D., F.R.S. 
Second Edition. Price 2s., post free, 
At the time when this book first aes (1885) no separate treatise on Electro-Chemlstry 
existed in the English language, and Dr. Gore. whose books on electrometallurgy, electro- 
deposition and |otber important branches of electro-technical work are known throughout the 
world, has collected together a mass of useful information and has arranged this in consecutive 
order, giving brief descriptions of the known laws and general principles which underlie the 
subject of Blectrs-Chemistcy. A very copious index is provided. 
Gore—THE ART OF ELECTROLYTIC SEPARATION OF 
METALS (Theoretical and Practical), By George Gore, LL.D., F.R.S. The only 
book on this important subject in any language. Over 300 pages, 106 illustrations. Price 
108, 6d., post free. : 
No other book entirely devoted ‘to the Electrolytic Separation of Metals exists in any 
language, those dealing with electro-metallurgy being all more or less devoted to electro-plating. 
Dr. Goure’s work is, therefore, of the utmost servite in connection with all classes of electrolytic 
work connected with the refining of metals. The book contains both the science and the art of 
“THE ELECTRICIAN ” PRINTING & PUBLISHING CO., LTD., 
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