Electro-Plating. Electricity from Heat. A Handy Light. An Experimental
Arc Lamp. A Magnetic Diver. Magnetic Fish. A Magnetic Clown. An Electric
Breeze. A Static Motor.
*Price Postpaid, 30 cents per volume*
All three volumes can be supplied bound together with handsome cloth
cover for $1.25 postpaid.
Vacuum Tubes in Wireless Communication
By ELMER E. BUCHER
*The only Text Book on the market devoted solely to the various
applications of the Oscillation Valve.*
An elementary text book for students, operators, experimenters and
engineers. Naval wireless men find this book especially helpful. Tells
in understandable language the fundamental operating principle of the
vacuum tube. Shows over 100 different circuits for the practical use of
the Vacuum Tube as a Detector, Radio or Audio Frequency Amplifier,
Regenerative Receiver, Beat Receiver, and Generator of Radio Frequency
Currents.
More than 100 diagrams reveal, step by step, in simple and direct form,
the uses of the vacuum tube.
*Cloth. Size 6 x 9 inches. 202 pages. 159 diagrams and illustrations.
Price, $1.75. Postage, 10 cents.*
Practical Wireless Telegraphy
By ELMER E. BUCHER
More than 65,000 copies of this book have been sold to date. It is used
in practically every school, college, library and training camp in this
country.
*Practical Wireless Telegraphy* is the recognized standard wireless text
book. It furnishes much information of utmost value in regard to the
very latest styles of wireless sets now in use.
It is the first wireless text book to treat each topic separately and
completely, furnishing a progressive study from first principles to
expert practice. Starting with elementary data, it progresses, chapter
by chapter, over the entire field of wireless—fundamentals, construction
and practical operation.
*Size 6 x 9 inches. 352 pages. 340 illustrations. Handsomely bound in
full cloth. Price, $1.75. Postage, 10 cents.*
Radio Telephony
By ALFRED N. GOLDSMITH, Ph D.
*It is the only book treating the subject of Radio Telephony in all its
aspects.*
This complete text on radio telephony is intended for radio engineers,
operators and experimenters, also radio electricians in the Navy, men in
the Signal Corps and especially men in the Aviation Service who handle
radio equipment. Students and others who desire to be clearly informed
concerning this newest and most interesting branch of electric
communication need this book.
It is written in clear style, and pre-supposes very little knowledge of
radio. Fully illustrated with wiring diagrams and previously unpublished
photographs of "wireless telephone" apparatus.
There are over 400 separate topics listed in a carefully prepared index.
*Size 6 x 9 inches. 256 pages. 226 illustrations. Full cloth, stamped in
gold. Price, $2.00. Postage, 10 cents.*
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_.
*This book is a necessity to every Progressive Experimenter.*
*It shows how to obtain the very highest efficiency from any station,
and how to comply with the law. How to tune, adjust your detector, spark
gap, phones, etc.*
*Price, 30 Cents, Postpaid.*
This book was written for the wireless experimenter who has passed the
amateur stage, but explains how the beginner also can obtain the very
best results from his station. It contains much useful information to
this end and many "kinks".
*IT SHOWS HOW* to receive or send on long or short wave lengths with
highest efficiency, to tune for longest distance reception of messages,
to use the buzzer test, how to test and connect condensers, receivers,
etc., how to use receiving transformers, variometers, etc., all with
_highest efficiency_ in view.
*IT ALSO DESCRIBES* the construction and use of a simple, inexpensive
wave meter to tune the station to any desired wave length, and tells how
to obtain a _sharp_ wave and a _pure_ wave.
*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.
*EVERY MODEL AVIATOR OUGHT TO HAVE A COPY*