Battleship Types of Three World Powers

Dreadnoughts of the U. S. NAVY

A Two-Ocean Fleet is Our Nation's Ultimate Goal

We Need More Physicists

Military Activity and Industrial Requirements Have Created an Unprecedented Demand

Delayed Jump, Eyes

Of Strip to Magnet Demonstrates Atomic Change

Have you Heterophoria?

Eye Exercises Using New Light-Polarizing Vectographs Can Improve Depth Perception

Sulfanilamide, Antibodies, and more

Why the New Drug is "Unfair to Bacteria"

Astrono-Mexico

North American Astronomers Assist at Opening of Mexico's New National Observatory

Why are we Short of Aluminum?

Huge Quantities of Electricity are Needed to Reduce this Common Metal from its Ore

Insulation, Plywood, and more

Board Made of Glass Replaces Cork

Industrial Trends, May 1942

NUTS, BEANS, SEEDS . . . AND Oil

Patents and Free Enterprise

Anti-Trust Laws Can Control Abuse of Patents Without the Necessity of Destroying Patent Rights

Air-Conditioning Fish

Mechanical Means Used to Provide Oxygen, Keep Temperature Low When Transporting Hatchery Fish

Ozone, Gasoline, and more

Still Much to be Learned About its Effects

Blind Rivets, Tap Reconditioner, and more

Can Be Set From One Side Only

Jet Propulsion

Italian Experiments With an Airplane That Uses No Propeller for Flight at High Altitudes

Templates, Multiple Mower, and more

Rapid Process Used in Aviation Industry