Volume 163, Issue 3
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Features
Coal Tar Began it
Vast Increase in U. S. Organic Chemicals Industry
Breath of Industry
Oxygen Torches Cut, Condition, and Pre pare Steel; Drill Stone and Concrete
Hot-Spray, Spring Isolator, and more
Lacquer Finishes Applied Faster And at Less Cost
First Aid For Burns
Application of Tannic Acid is Procedure That Has Received World-Wide Recognition
Stimulating, Fair Exchange, and more
Modern Version of the Medical Coil
Interstellar Gas
More and More, Astronomers are Finding Matter as Particles Between the Stars
Build No Freaks
Warships Can Be Better Designed To Meet Needs of Their Own Classes
U. S. Tanks, North Carolina
New Armored Corps Modelled After Those of Germany
Mud, Concrete, ond Oil
Drilling Mud, Treated Like a Favorite Child, Makes Possible Wells Miles Deep
Under Mohile River
Vehicular Tunnel Built On Land, Floated Into Place, Shows Engineering Advances
Road Protection
Bags of Green Concrete Laid as Rip-rap
Helicopters
Rotating-Wing Aircraft Exhibit Desirable Characteristics for National Defense
Airships, Engine, and more
Still Hold Possibilities for Military Purposes
No Short-Cut Horticulture
Plant Growth Chemicals Require Painstaking Care. Promise Significant Results
Efficient Turbines, Star Jackets, and more
Cheaper Electricity Should Come From New Installation
Physics In Court
Computations by Which Police Can Work Out Driving Speeds from Skid Marks after Accidents
Edison, Inventors Aid, and more
One of His Co-Workers Supplies An Anecdote