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is-oo V'^l SEPT. OVER nO'^^J? 19 18 1 75 15 CTS. Electrical ILLUST. Experimenter SCIENCE AND INVENTION REG. U. S. PAT. OFF. i »J.ASSQING AEROPLANES WITH FLAME AND BOMB SEE PAGE. 300 LARGEST CIRCULATION OF ANY ELECTRICAL PUBLICATION . — ! — BE A CERTIFICATED ELECTRICIAN YOUNG MEN The country needs more trained, graduate electricians. Thousands have gone into the Govern- LulOI I^XFIMI EjIi rnent service and there is such an unusual demand for competent electrical men that I am making a wonder- ful offer at this time. HERE IS YOUR OPPORTU- NITY! I want to send you my splendid offer now. Don't hesitate because of age or experience. Young men, boys and old men must now fill the gaps and l:cep business going. DO YO'UR PART. Pre- pare yourself for a real position, by my Home Study Course in Practical Electricity. I am Chief Engineer of the Chicago Engineering Works. I have trained thousands of men and can help you better than anybody else. We also have large, splendidly-equipped shops where you can come at any time for special instruction without charge. No other correspondence school can give you this. SPECI.'\L OFFER: Right now I am giving a big, valuable surprise that I cannot explain here, to every student who answers this ad. Write today H62£ to n0022 a Week Go after some real money. Qualify for one of the thousands of splendid positions open. All you need to start is a few months snappy, prac- tical mstvuction from a competent engineer. Come tome NOIV. I'll give you my personal care to ensure rapid and efficient progress. My course is intensely practical. It is highly condensed, simplified, up-to-date and complete. I am so sure y^ju will make a splendid success in this study, that I will Guarantee Under Bond to return to you every cent paid for tuition, if you are not entirely satisfied when you receive your Electrician's Certificate granted you as a gradu- ate of mv school. FREE— Lessons and Outfit—FREE Send me the Free Outfit Coupon at once. Do it now! For a limited period I am making a slashing cut in the cost of tuition, and giving each new student a grand outfit of Electrical Tools, Material and Instruments— in addition Abso- lutely Free. I will also send you-—free and fully prepaid —Proof Lessons to show you how easily you can be trained at home to enter this great profession, by means of my new, revised and original system of mail instruction. Use this "Free Outfit" Coupon ACT PROMPTLY CHIEF ENG. c6of^E; Dipt, 2* Get the full benefit of this great offer. Send the 441 C*^ St., CHICAG^;, ILL. Coupon or a postal for free information without delay. Do -V,.- it now before my free oiifers and guarantee are withdrawn. Sir: Send at br\^prji\.\\\y pr.e'p^S and entirely f ree—complete — particulars of .youi" -grf^Cp/l^:3or this month. CHIEF ENGINEER COOKE Xainc . Address Chicago Engineering Works DEPT. 29 I 441 Cas3 Street CHICAGO, ILL. Vou benefit by mentioning the "Electrical Experimenter' zvhen writing to advertisers. September, 1918 ELECTRICAL EXPERIMENTER 289 "See them First — Pay ELECTRICITY t afterwards" AS EXPERTS KNOW IT Learn electricity as you would in actual PRACTICE—in accordance with the methods employed by the highest paid electrical experts in America. Tlie New McGraw-Hill Library of Prac- tical Electricity contains the aclnal working facts which you need in order to succeed in the electrical field. Terrell Croft, formerly with the Westinghouse Company, makes the coniiuest easy for you. A New Standard In Electrical Literature The New Library of Practical Electricity by Terrell Croft marks a new era in electrical literature. The great field of electrical engineering, with its limitless possibilities of earning power, is brouglit to you in a form that makes success easy. ' ;-^ The Library is a creation—an achievement that is without parallel in • ; technical literature, because it sticks to actual practice throughout its ;i(HM> pges. ,^ A letter that means something to YOU— McGraw-Hill Book Company, Inc.. 239 West 39th Street. New York, N. Y. Gentlemen: In an attempt to express myself about CROFT'S NEW LIBRARY OF PRACTICAL ELECTRICITY. I have never seen, and do not believe there was ever printed in the English language, a more comprehensive set of books. It is a library that is just as valu- able to the novice as to the ex- pert, because it is all practice. Respectfully. GUY H. PEIFER, Chief, Doplan Silk Corporation, Hazleton, Pa. (CROFT'S NEW LIBRARY OF PRACTICAL ELECTRICITY—8 VOLS.) Now is the time to master Electricity—Now is the time to prepare for a high salary ^ Old books won't do. Amateurish books won't do. Books Not one cent in advance—Just the coupon y(0>i compiled by "desk authors" or men with no practical ex- perience will not serve your purpose. Examine this new Library for ten full days without ex pense. Find out for yourself why it is now taking the lead Practical books are easiest mastered. Practical books, in electrical book sales in America. Use the books you see fit for ten days. Look at the hundreds of illus "<: G raw- Hill written by practical men, teach you accurately and rapidly. I . trations that clear up all the mysteries in electrical > \^ BoolkCc. Inc. 239 W. 39th St. There is nothing in the Croft Library which you cannot practice. Stick a couple of the volumesunies in your ^ NEW YORK understand. Terrell Croft tells you the secrets of success pockets, and refer to them during thee day. Fig- /^[V. have in electricity in plain words, figures and illustrations. ure out in an instant the problems that ^1 II Gentlt-men: heretofore taken hours. ^1 1/ I'lease send me the Li-Li Nothing is left to the imagination. There Is no guesswork. ft I brary of Practical Elec-Ele( t triclty (shipping charges_ is Then send us $2 per month for eigh ^' I f" _ pre-prt There no theory or higher mathematics. .^aid) for 10 days' free exam- at months, or return the set entirely inati^n. If satisfactory, I will Send now for these eight volumes. No matter how many l)00ks on our expense. You risk nothing by send $2 in ten days and $2 per electricity you possess, you are unfair to yourself unless you take returning the attached coupon. month until $16 has been paid. If advantage of this free examination privilege. No matter whether you not wanted I will write you for return .hipiJJng insiructio! are beginner or expert, these books will show you the clear road to success. Inspection will prove this. ACT 239 West 39th Street, New York, N.Y. when writing to advertisers. You benefit by mentiomng the Electrical Experimenter'' — 290 ELECTRICAL EXPERIMENTER September, 1918 MODEL TWO-STORY STRUCTURE IDEALLY LIGHTED DRAFTING AND COMPLETE SEVEN-POLE TRANSMISSION FOR WIRINli PRACTICE DESIGNING ROOM LINE ILLUSTRATING THREE OF THE 10 DEPARTMENTS OF PRACTICAL ELECTRICAL EDUCATION, TRAINING, DEVELOPMENT 383 Electrical Experiments for Each Student ONE SUPERIOR WAY BY WHICH THIS SCHOOL MAKES ELECTRICIANS AND ENGINEERS hundred and eighty-three demands and recognizes, and for which high salaries of thorough practical education, training and de- •"« .4nd Jour school life here will be so fas- velopment. THREEeipeiiuieuibpvneriments a y"rupar luifnr vniivou tnlu I'-''d. cinating the 12 months will be -the best and most POSITIONSpnsiTinwc FORcna GRADUATES,rRAniiATF<: work out yourself! And the most profltalJle of vour life. No matter what your past modern electrical appliances, appa- education vou can enter the electrician class here. This school enjoys the highest regard of electrical the details. industries, and those employing master electricians raiUS,ratiis macnines,niapliinp« lahnratnrvlaooraiorv anri work «:hnn -'"ail coupon»- now for ana WOrKSnop j^,,^ engineers because of the ability of its gradu- materials with which to work, by which to B. S. AND E. E. DEGREES IN 3 YEARS. ates, due to the practical and thorough instruction, learn from actual experience! Also a This school teaches Electrical Engineering also training and development given here, in accordance Science and Electrical Engi- with the electrical world's requirements. And large seriesKories oinf practicalnraftinni lectures,Ipntnrps anaanrl justiiict inethe and gives Bachelor of ^^^^.^ Degrees of recognized standing under the concerns look to this school tor their bigger electri- necessary text book instruction: All |a„s of Wisconsin—in 3 years (:i6 months). This cal men. Consequently, this scliool can insure under the guidance of an able faculty com- substantiates this school's standing and ability and splendid positions to its graduates. So that your success is certain if you enroll here your success poseaoinn«prf nf practical,nrartiral electricalpiprtriral menm^n cno^enr'tinsipn the higher, recognized electrical education you can — obtain here in a short time. begins the moment you enroll. Soon as you graduate irom nign positions in tne actual neia OI Young men with High School diploma, or the equiva- you can liave a position and be accepted by the electrical practice. That is what you can lent are accepted in the Electrical Engineering De- electrical world as an electrical man of ability- boy just out of school. get at this school and that is what you partment. others who finish the Electricians' not a ' ("ourse with enter Electrical Engineer- ] -„ . _ ^j A„j ;, „,* *!.„* -J 1 diploma can v/m, ^ali c-adw u/um c vnn i cadw need to succeed. And isn t that ideal YOU CAN EARN WHILE YOU LEARN, i,,^ class-and receive degrees referred to In 3 system of electrical education just what vears.
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    PT. OVER T S. LLECTRICAL ILLUST. ;XPERIMENTER. CIENCE AND INVENTION _LASSOING AEROPLANES WITH FLAME AND BOMB SEE PAGE 300 * LARGEST CIRCULATION OF ANY ELECTRICAL PUBLICATION www.americanradiohistory.com _ _BE CERTIFICATED ELECTRICIAN YOUNG MEN The country needs more trained, graduate electricians. Thousands have gone into the Govern- LISTEN ment service and there is such an unusual demand for competent electrical men that I am making a wonder- ful offer at this time. HERE 1S YOUR OPPORTU- NITY! I want to send you my splendid offer now. Don't hesitate because of age or experience. Young men, boys and old men must now fill the gaps and keep business going. DO YOUR PART. Pre- pare yourself for a real position, by my Home Study Course in Practical Electricity. I am Chief Engineer of the Chicago Engineering Works. I have trained thousands of men and can help you better than anybody else. We also have large, splendidly -equipped shops where you can come at any time for special instruction without charge. No other correspondence school can give you this. SPECIAL OFFER: Right now I am giving a big, valuable surprise that I cannot nxplain here, to every student who answers this ad. Write today! X46 °-_° to $100 °_° a Week Go after some real money. Qualify for one of the thousands of splendid positions open. All you need to start is a few months snappy, prac- tiral instruction from a competent engineer. Come to me -NOW. I'1I give you my personal care to ensure rapid and efficient progress. My course is intensely practical.