Scientific American Magazine

Fire Losses Do Not All Appear in the Statistics. Small and Unreported Fires are Quickly Controlled With Portable Equipment. But the Right Kind Must be at Hand at the Right Time, and Employees Must Know How to Use it. Water is still a Good All-Around Extinguishant

The War Has Framed the Futures of the Nonferrous Metals With a Number of Provocative Question Marks. How Will Aluminum, Magnesium, Copper, Zinc, Lead, and Other Important Metals Fare Individually When Peace-Time Competition Really Gets Tough? Some of the Answers are Clear Now

Automatic Operation is Attained With the Cathode-Ray Tube. By Blacking-Out Parts of the Tube's Screen, Light Shows Only When Defective Parts Pass on the Production Line. A Photocell Watches the Screen and Activates a Reject Mechanism When it Sees Light, Giving Highly Accurate Results

Many New Industries Are Using New Solvents in New Processes. In Order That Workers May he Protected Against Possible Danger from these Substances, a Number of Agencies are Co-Operating. Standards of Vapor Concentration are Being Set, and Preventive Measures Developed

Though the Bolt Designers Most Diligently Design, and the Metallurgists, the Engineers, and Manufacturers do their Utmost to Provide Excellent Bolts, the Bolts that Carry Dynamic, Fluctuating Loads in Severe Service will Fail from Fatigue unless Science is Correctly Applied in Tightening Them

In the Science of Biomechanics, Combining the Knowledge of Surgeons and Engineers, is to be Found at Least a Part of the Answer to Fatal Aircraft Accidents. An Understanding of the Strengths and Weaknesses of the Human Body can Aid Aircraft Designers in Building Safer Ships

Not All Glass is Fragile. Glass Intended for Safety Lenses is Changed from Tender to Tough by the Comparatively Simple application of a Trick That Reverses its Normal Stresses and Puts the Surface Under Compression Balanced by Internal Tension. Industrial Eye Injuries Can be Reduced