And last but not least

And last but not least Over 100 large hook-ups of wiring diagrams fully illustrated in a concise and clear manner. Loop and straightaway aerials, grounds, helixes, spark gaps, anchor gaps, leyden jars, induction coils, transformers, keys, aerial switches, tuning coils, loading coils, loose couplers, variometers, fixed condensers, silicon, electrolytic, carborundum, perikon and audion detectors, telephones, potentiometers, etc., you can find them all and how to connect. A hook-up for any set accompanied by full explanation. None are missing. They are all there. There are no two alike.

The most complete and reliable data ever collected. The result of thousands of experiments by some of the most famous wireless experts in the country.

Read now before the supply is exhausted or you forget. You will be sorry if you don’t.

Price, 25 Cents, Postpaid

Note: This book is always kept up-to-date by frequently issuing new editions. Send for the latest copy.

The Operation of Wireless Telegraph Apparatus

Do your Wireless friends come to you for advice on constructing and operating their apparatus or do you go to them for information?

Here is a chance for YOU to become the authority.