Volume 165, Issue 2
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Features
Keep Our Transport Planes
Scheduled Airlines are Essential to National Defense
Will Bacteria be Used in War?
Insurmountable Difficulties Stand in the Way of Employing Disease-Causing Organisms
Medium Tank, Bombproof, and more
Weighs 28 Tons; Speed 25 Miles Per Hour; Concrete Roof on Aircraft Plant; Glaring Lights May Be Effective Protection
When Bores Must be Hardened
Electro-Magnetic Induction Process Provides a Means of Improving Wearing Surfaces
New Tin from Old Cans
Can the Tin from Our Used Tin Cans Be Salvaged--Profitably?
Better Tobacco, Canada Far Ahead, and more
The Healing Poison
Snake Venom Stops Bleeding and May Win a Place as a Deadener of Pain
Salt Loss, New Drug, and more
Leading Medical Journal Favors Its Replacement
A Puzzle Solved?
A New and Promising Interpretation of the Old Problem of the Solar Corona
'Sky-Hooks' in Bridge Building
Temporary Cables Slung from Towers Help Build Fixed-Arch Span Across Niagara
Ancient Engineers, Tunnel Trucks, and more
Our Search for the Supernatural—V
Independent Writing "Phenomenon" is Produced Through Natural Means
Bats on the Beam
Nature's "Built-in" Equipment Controls Blind Flying by Supersonic Broadcasting
Your Breath, Electronic Camera, and more
A Little Discovery That May Turn Out Bigger; Studies Thin Films of Crystals. Supplements X-Ray Studies; Counting Meteors in Cloudy Weather and Daytime
If You Value Your Eyes
Eye Protective Glasses Must be Correctly Designed for the Job They Have to Accomplish
Teledeltos, Cool, and more
All-Glass Tape, File, and more
Air Fighters
Characteristics Desirable in the Military Type that Keeps Bombers Away
Flaps, Flying Boat, and more
Air Brakes for Dive Bombers; Most Powerful Patrol Bomber; An Important Factor in National Defense; New Process Speeds-up Production