(°2 ) 
to the large number of isolated facts that had already been discovered, as to form some idea of the 
bearing of these upon one another, and thus to arrive at a clear conception of what takes place in 
each part of the arc and carbons at every moment. The attempt to correlate all the known 
phenomena and to bind them into one consistent whole led to the deduction of new facts, 
and opened up fresh questions, to be answered in their turn by new experiments. Thus the subject 
grew and developed into what may almost be termed a natural way. The Ga acres of other 
observers have been employed in two ways : (2) In confirmation of theory developed from my own 
experiments, and (2) as the. basis of theory for which further tests were devised. M. Blondel’s 
interesting and systematic researches, the admirable work of Mr. A. P. Trotter, and Prof, 
Ayrton’s Chicago Paper were all laid under c ontribution, and the deductions drawn from them 
tested by new experiments. The excellent work done by men whose names are quite unfamiliar to 
us in England, including Nebel, Feussner, Luggin, Granquist and Herzfeld, has been utilised, and 
in Chapter II, I have given short abstracts of most of the important Papers on the direct-current 
arc that appeared up to the end of the nineteenth century. 
Baines—BEGINNER’S MANUAL OF SUBMARINE CABLE 
TESTING AND WORKING. ByG. M. Baines. Second Edition. Cloth Bound, 
7s. 6d. nett; post free, 8s. 
This book has been written to meet the requirements of those about to commence the study 
of Submarine Telegraphy. All subjects demandia attention have been brought within the scope 
of the volume and have been dealt with at sufficient length to enable an intelligible idea to be 
obtained of them. With regard to the algebraical portion of the study, all the formule have been 
worked out step by step, and, where convenient, have been supplemented by arithmetical 
equivalents. The book is divided into 18 chapters, and deals with: Batteries, Ohm’s Law, Joint 
Resistance, Wheatstone Bridge, Bridge Measurements, Insulation Test by Direct Deflection, 
Inductive Capacity, Internal Resistance of a Battery, &c., E.M.F. of a Battery, &c., Current 
Strength in Wheatstone Bridge, &c., Tests of Broken or Faulty Cables, and Description of 
Apparatus, &c, ; 
Beaumont—THE STEAM-ENGINE INDICATOR AND INDI- 
CATOR DIAGRAMS. Edited by W. W. Beaumont, M.I.C.E., M.ILM.E., &c. 190 
pages, 116 illustrations. Price 3s. 6d., post free. z . 
The object of this book is to place in the hands of students and practical men a concise 
guide to the objects, construction and use of the indicator,and to the interpretation of indicator 
diagrams. Lengthy discussion of theoretical or hypothetical matters has been avoided. The 
behaviour of steam and its expansion under different conditions have been treated in a simple 
manner so far as these questions are important to the consideration of indicator diagrams in 
their most usual practical applications, 
Bond—RATING OF ELECTRIC LIGHTING, ELECTRIC 
TRAMWAY AND SIMILAR UNDERTAKINGS. By W.G. Bond, A.I.E.E. Now 
eet cloth, 8vo, price 2s. 6d, net. 
This little book is intended for the use of Directors, Secretaries, Engineers and other 
Officials connected with Electric Traction, Lighting and Power Distribution Companies. The 
chief object of the Author has been to enable those who are not familiar with the principles and 
practice of rating to ascertain for themselves whether the Rateable Value of their property is 
reasonable or excessive, and thus avoid unnecessary expense at the outset. 
+ 
Carter—MOTIVE POWER AND GEARING FOR ELECTRICAL 
MACHINERY: A Treatise on the Theory and Practice of the Mechanical Equipment 
of Power Stations for Electric Supply, and for Electric Traction. By E. Tremlett Carter, 
C.E., M.I.E.E., F,R.A.S., F.P.S,(Lond.), &c. 650 pages, 200 Illustrations, Scale 
Drawings and Folding Plates, and over 80 lables of Engineering Data. In one volume. 
Price 12s. 6d., post free ; abroad, 13s. Vew edztion, 1904. 
Part I.—Introductory. Part II.--The Steam Engine. Part III.—Gas and Oil Engines. 
Part IV.—Water Power Plant. Part V.—Gearing. Part VI.—Types of Power Stations. 
This work presents to consulting engineers, contractors, central-station engineers and 
engineering students the latest and most approved practice in the equipment and working of 
mechanical plant in electric power generating stations. Every part of the work has been brought 
completely uP to date; and especially in the matter of the costs of equipment and working the 
latest available informatfon has been given. The treatise deals with Steam, Gas, Oil and 
Hydraulic Plant and Gearing; and it deals with these severally from the three standpoints of 
(1) Theory, (2) Practice and (s) Costs. 
* “Motive Power AND GEARING FOR ELECTRICAL Macuinery”’ is a handbook of modern 
electrical engineering practice in all parts of the world. It offers to the reader a means of 
comparing the central station practice of the United Kingdom with that of America, the Colonies 
or other places abroad ; and it enables him to study the scientific, economic and financial principles 
upon which the relative suitability of various forms of practice is based, and to apply these 
principles to the design or working of plant for any given kind of work, whether for electrical 
supply or for electric traction. It is a treatise which should be in the hands of every electrical 
engineer throughout the world, as it constitutes the only existing treatise on the Economics of 
Motive Power and Gearing for Electrical Machinery. 
“ THE ELECTRICIAN” PRINTING & PUBLISHING CO.,, LTD., 
I, 2 and 3, Salisbury Court, Fleet Street, London, E.C, 
