Feature

Books of the Week

Zirconium Metal Produced

Declaration Preserved

New Machines and Gadgets

Front Matter

Sex Hormones Fight Age

Record Low Achieved for Maternal Mortality

Gas from Cheap Fuel; Wood Waste for Wallboard

First Space Ships to Have Flying Saucer Shape

Improved Casein Fibers Hardened with Metal Salts

Step toward Pilotless War

East and West to Be Warmer than Usual