Feature

New Machines and Gadgets

Mercury Appears Briefly

Speed for Air Supremacy

New Conducting Plastics

Deafness from Loud Noise

Antibiotic from Bananas

Cab-over-Engine Featured in New Helicopter

DDT Action May Depend on Solution in Skin Lipids

Precision Calibrator for Aerial Cameras Developed

Survival by Selection

Toll Telephone Dialing

[Photograph]: Carrier-Based Blimp