Science and Invention, vol. 11, no. 6, October 1923

This issue is composed of the following stories and articles, some of which go unattributed on the table of contents:

Editorial
A Whirl of Merriment
Trick Movie Set Fools Us
Movies Expose Fake Spiritualists
A Modern Charlatan—The Unscientific Work of Dr. Albert Abrams

Sound of ’Plane Attracts Aerial Torpedo
By Raymond F. Yates

$12,000 or More in Prizes for Pictures

Largest Falls in the World
By Fred W. Horton

How to Avoid Auto Accidents
By H. Winfield Secor, E.E.

Our Cities of the Future
By H. Gernsback, Member of the American Physical Society

Dr. Hackensaw's Secrets—No. 21—Dr. Hackensaw's Trip to the Moon
By Clement Fezandié

Around the Universe—Fourth Installment
By Ray Cummings

Sky-Scraper to Tower 80 Stories
Smoke to Hide Bombing Planes
Mt. Etna. Destroyer of Cities

John Doe—His Fingerprint
By Fairfax Proudfit Walkup

Will You Be Our Reporter?
A Flaming Log Sign
Magnet Holds Auto While Globe Spins
Weird Shenandoah Caverns
Oddities of Our Body

Paper “Film” Movies a Success
By Eric A. Dime

The Power of Sap

Electricity from the Sun
By Dr. H. Becher

New Suspended Electric Railway
Toy Contest—$100.00 in Prizes

Making Shot
By Robert H. Moulton

Combination Auto and Boat
By Joseph H. Kraus

Auto Safety Light
Two Valuable Motor Hints

If a “Ford” Used All Accessories!
By A. P. Peck

Magic for Everybody
By Prof. Joseph Dunninger

Popular Astronomy—Star Map for October and the Comparative Density of the Various Stars and Planets
By Isabel M. Lewis, M.A. of the U.S. Naval Observatory

Home Mechanics
By William M. Butterfield

Optical Illusion Contest “Awards”

Everyday Chemistry
By Raymond B. Wailes

Decorative Effects from Oil
By Raymond B. Wailes

Miscellaneous Constructor Atricles
How to Make Micro-Photographs

How-To-Make-It Department—$30.00 in Monthly Prizes
Wrinkles, Recipes and Formulas—$5.00 Montly Prize

Radio to Aid in Mine Rescue
By W. B. Arvin

Balloons to Support Antennae

Radio-Directed Torpedo of To-morrow
By Graser Schornstheimer

Receiving the New Wave Lengths
By Marius Logan

Radio for the Beginner—Rheostats
By Armstrong Perry

Four Good Single Tube Hook-Ups
By Marius Logan

$200.00 Single Tube Radio Context, Extended to November 15th

A Special “Reflex” Amplifier
By R. B. Hall

Radio Oracle
Latest Patents

Scientific Humor—Prizes for Best Jokes
The Oracle
Patent Advice
Revised Broadcast Calls to Date