Feature

Better Lake Swimming

Weather Bureau Service Not Adequate for Jets

Fire Protection System Draws off Dangerous Fumes

Concrete Durability Hurt by Penetration of Water

March Will Be Wet in Most of Nation

Fresh Water from Ocean

57 Varieties of U. S. License Tags Are Problem

Reversed Washer Used in Air-Cooling System

[Photograph]: Giant Radio Telescope

Predict Fading for TV

New Machines and Gadgets

Front Matter