*EVERY BOY IS ADVISED TO*
*SEND FOR A COPY*
Written in a very clear and simple style, the book is invaluable to a beginner. He will be able with its aid to construct simple apparatus of the latest and approved type. The instruments described in the book have been the subject of considerable experimental work and special study. They are modeled along simple lines so that they will be easy and inexpensive to construct, but at the same time combine features which make them very sensitive and capable of receiving or transmitting messages greater distances than some more complicated apparatus.
*THIS BOOK, CONSIDERING ITS WORTH, IS A GIFT AT 25c.*
There are no old or obsolete forms of wireless apparatus discussed, but only the latest types of tuning coils, receiving transformers, fixed condensers, keys, spark coils, detectors, etc. The book is illustrated by numerous detailed working drawings giving all dimensions. Several full-page views of the apparatus enable the beginner to fully comprehend the text.