Show RADIO BOOK GIVES HELP TO AMATEURS Henleys Radio Circuit Designs Designs De De- signs is a new lew radio book written written written writ writ- ten and compiled complIed by a staff stat of ot radio engineers of ot high standing It fills flUs flUsa a long-felt long want in radio literature literature literature litera litera- ture and covers not only receiving but also transmitting circuits Every cult cl that is in use uso is thoroughly covered both In jn diagrammatic and textual form The book contains pages with Illustrations which are well wen arranged and cover the whole field of ot radio transmission transmission transmission sion and rec reception The book boOk iS is divided Into ten chapters chapters chapters chap chap- and In addition to the tho circuit diagrams has several tables giving very handy Information regarding tubes coils colls condensers batteries etc The relationship of ot frequency to wave length Is also care carefully tUlly ex explained explained ex- ex pained and a complete table showIng showing showing show show- ing how to convert one to the other is also Included The book willbe will willbe willbe be found valuable by every radio fan fan- It being the best book of ot Its kind that we have yet seen It surpasses all others In the scope of its subject matter in the simplicity simplicity sim sim- I and novelty e of t presentation wt lori ahdor and in thoroughness 1 s so o of detail It deserves a a hea tv reception bv hy the radio N Norman W. W Henley Pub Co New York |