Looking Ahead With the Editor, September 1929
October-Aviation Number
Features
Canned Astronomy
What the New Planetariums for Chicago and Philadelphia Will Be Like
From the Scrap-Book of Science, September 1929
Licorice the Versatile
This Age-old Sweetmeat, Medicine, and Sacred Herb Links the Modern World With Ancient Peoples and Religion
Uncle Sam Gives Us New Money
Why Does an Oil Gusher Gush?
An Understanding of the Importance of Natural Gas Replaces Misconceptions About "Oil Pools" and "Rock Pressure"
Charting Canada's Wilderness from the Air
Rich Mineral Areas Amid Lakes and Forests of Northern Canada Mapped Accurately for the First Time
Our Army's Mechanized Force
The Tank Promises to Force a Reorganization of Armies for It Is Now Much More Formidable Than During World War Days
What Becomes of the Star Light?
The Stars Send Out Their Light into Empty Space. Does It Go On Forever? If Not, Where Does It End?
Is the Airplane Diesel Practical?
A Summary of the Opinions, pro and con, of Men High in the Aeronautical Industry
Silvering the World's Largest Telescope
A Witness Describes This Fascinating Process
Foiling the Burglar--III
The Invisible Guardians of Wealth Are Little Clocks and Disks of Metal
Last Call for Sea-Safety Contest
The Zeppelin's American Home
Two World's Largest Zeppelins for Our Navy Will Be Built in Huge Hangar Now Arising at Akron, Ohio
Steam Stages a Come-Back
Question of Steam versus Hydro Generation of Power is Being Answered by Improvements in Steam Power Equipment
Designing Large Telescopes
A Suggestion of the High Engineering Refinement Involved in This Highly Specialized Problem
World's Largest Vineyard Uses Machinery and Chemical Control
A California Community of Over Two Thousand Five Hundred Depends on Grape By-products Which Can Be Legally Sold
Ancient History from Aloft
A Fascinating Archeological Discovery by Aerial Photography, a Method Now Being Developed in Europe
Compressed Air Used in Novel Hospital
The "Heat Makes Cold" Refrigeration Unit
The Amateur Astronomer, September 1929
Departments
- Departments
Among Our Contributors, September 1929
Back of Frontispiece, September 1929
The Planetarium, and the Lecturer Using an Electric Pointer
Our Point of View, September 1929
Our Newest Fighting Tank, Portable Flashing Warning Lamp and more
The "Flamingo," a Metal Plane, Gliding in Germany and more
The Weather and Pain in the Joints, Arsenical Poisoning and more
Hydrogenation Comes to Revolutionize Gasoline Production, Organic Substances Reduce Boiler Scale and more
Current Bulletin Briefs, September 1929
The Heavens in September 1929
Rear Admiral Awarded Damages in Torpedo Plane Patent Suit, Sleeve Valve Motor Held Different From Prior Patent and more