*LESSONS IN WIRELESS TELEGRAPHY*
FOURTH EDITION
72 Pages 66 Illustrations
A systematic course in the elementary principles. Written so you can understand it. In 35 lessons.
1.—Magnetism. 2.—Magnetic Induction. 3.—Primary and Secondary Cells. 4.—Electric Currents. 5.—Electromagnetism. 6.—Dynamo-Electric Machinery. 7.—The Induction Coil. 8.—The Transformer. 9.—Leyden Jars and Condensers. 10.—Electromagnetic Theory. 11.—Electric Waves. 12.—Principles of Wave Telegraphy. 13.—The Aerial. 14.—The Wireless Coil. 15.—The High Potential Transformer. 16.—The Oscillation Condenser. 17.—The Helix. 18.—Spark Gaps. 19.—The Key. 20.—Aerial Switches. 21.—Anchor Gaps. 22.—Detectors. 23.—Tuning Coils. 24.—Loose Couplers. 25.—Fixed Condensers. 26.—Variable Condensers. 27.—Telephone Receivers. 28.—Hot Wire Ammeter. 29.—Potentiometer. 30.—Dead End Losses and Switches. 31.—Distributed Capacity. 32.—Poulsen Arc. 33.—Receiving Undamped Waves. 34.—The Audion Amplifier. 35.—Hook-Ups.
*Price, 25 Cents, Postpaid*
If you want to understand your apparatus and how it works, you will need this book—over 15,000 copies in use.
*Price, 25 Cents, Postpaid*
*Model Flying Machines*
*HOW TO BUILD AND FLY THEM*
Will prove interesting and valuable.
Have you ever built and flown a Model Racer?
If not, you have missed something.
Price, 25 Cents, Postpaid.
Model Aeroplaning is one of the most fascinating and instructive of sports.
Thousands of young men and boys have formed Model Aero Clubs and organized Flying Contests throughout the country.
"MODEL FLYING MACHINES" of the Arts and Sciences series is the only book giving reliable data and instructions for the construction of practical Model Aeroplanes.
IF YOU ARE A BEGINNER, this is the book that you ought to have. It will start you right. It tells how to build seven different types of machines, starting with the simplest Monoplane and finishing with several Long Distance Racing Models.
IF YOU ARE INTERESTED IN MODEL AEROPLANING, this book will prove the one you have been looking for. Gives valuable "Kinks". Tells how to carve propellers, make winders, adjust and fly machines, etc. Fully illustrated with large size, detailed working drawings, showing the exact size of each part. Twelve full-page plates.
Printed on first-class paper. Heavy cover in three colors.
Sent postpaid by return mail upon receipt of 25 cents.