Feature

New Insulant Gives More Room in Refrigerators

New Machines and Gadgets

Front Matter

Scientists Best Defense

Inhaling Amyl Nitrite Will Cure Hiccup Seige

Glare-Reducing Headlamp

Atomic Frontier Advanced

[Photograph]: Timing Cameras

Six American Scientists Join MacArthur’s Staff

Radioactive Germs Made

Streptomycin for Plague

Engineers Need Biology