Great FREE Offer to Electrical Engineers &Electrical Workers ENCYCLOPEDIA WE INVITE YOU TO EXAMINE THIS WORK IN YOUR OWN HOME, FOR ONE WEEK, ABSOLUTELY FREE OF CHARGE OR OBLIGATION TO PURCHASE THE ELECTRICAL r rhinl IJfiiiioa -Newly Revised a i ml Exl en<le<l General E d ito r:S. G . Blaxland Stubbs Associate Editors: Arthur Arnold, A.M .I.E.1 C A.M.l.Mech.E., Editor of “The Power Engineer," R.A. Baynton, IJ.Sc. (Eng.). A.C.G.I., Philip Kemp, M.Sc. (Tech.), MIEE M cm.A.I.E.E., Head of the Polytechnic School of Engineering, S. 0. Pearson, B.Sc., A.M .I.E.E., S. Austen Stigant, M .I.E.E., mI'.A .I.E.E .G. W. Stubbings, B.Sc. (Lond.), I'.Inst.P., A.M .l.E.E. THE FIRST AND ONLY BOOK OF ITS KIND 1,500 Pages. 2,100 Articles. Over 2,400 Photographs, Drawings, Diagrams, etc. HPHIS New Edition of “The Electrical Encyclo- •*- pedia,” completely revised and brought tip to date, carries many important additions and improvements, including new plates and new articles. Written by experts in every branch of the profession, this comprehensive work contains sound, up-to-date, authoritative information, and covers thousands of problems and questions of everyday work. The rapid development of electrical technology means an enormous increase of opportunities for the electrical engineer who keeps abreast of advancing knowledge. YOU can seize these new opportunities NOW by the aid of “The Electrical Encyclopedia.” Whatever your particular subject or job you will find that this work will add to your efficiency, aid your advance in your profession and secure certain SUCCESS. T oi«•<»¦ ir o r lic r s enfjuf/ctl in armament <iml aircraft production ,“The Electrical Enc.y doped ia ”trill pro vein v a lu able .37 Plates (I inC olour and 8 Folding Plates). 2 Large Folding Charts. Over 120 Reference Tables and Charts. THE SCOPE OF THE ENCYCLOPEDIA Will be seen in this list of sections on which it was built up. A c cum u la tor sand Batter i es. Application solE l e ctr i city .—Indus,trial, domestic, medical, scientific, etc., as, for instance, Agriculture, Cinema Plant, Refrigeration, Ultra-Violet Ray apparatus. Welding, etc. Definition s.—Ail essential group with hundreds of terms. Gene r a tor sand Motors .A.C. and D.C.— Including large and small machines, from the 32,000 kVA alternator to the tiny fractional h.p. motor with all accessory machines and apparatus. Heating and Coo king .—Every form of modern apparatus described with maintenance and repair notes. Instruments and Testing .Meters ot every variety now in use. faults and fault location in cables, wiring, generators and motors, the best methods oftest, and testing instruments. Law and Regulations .—Amply covered and explained. Lamp sand L ig h ting Method sand Fittings .—Modern methods, such as Lay Lighting, Cornice Lighting, Tubular Lighting. Flood-lighting, and new apparatus, as Hot Cathode Lamps, fully dealt with. Miscellaneous :Mate rials and Special Departments .—Here are included tho materials used in electro technology: specialist sections such as electro-chemistry, electro-metallurgy, and other matters. Sup ply and Trans miss ion.— The apparatus, principles, and methods employed between the power station and the consumers' terminals. Switch g e a rand Switch board .—The immense variety of modern control apparatus in principle and detail. Theory ot E lo ctr ic alP r act ice.— I’ut clearly and simply without incursion into higher mathematics. Trans former sand Rectifiers .—Includes every variety of transformer, as well as Metal Kectiflers, Mercury Arc Rectifiers, etc. Wire lessor Radio Work .—Dis- enssions of theoretical principles and their application in modern radio practice. Instruction is given on repair and maintenance. Wiring :Methods .Mate rials ,and Installation.—Including all cables and the best apparatus and fittings. 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