Feature

Nature Ramblings: Men of Good Will

Slot Machine Nickels Sorted by Conductivity

Front Matter

Electron Microanalyzer

Device Cuts Ultra-Thin Slices for Microscope

Carnegie Researches

Fluoride Reduces Caries

Former Surgeon General Heads Information Bureau

Science Speeds War and Post-War

200,000 Cinchona Plants Sent to Neighbor Republics

Safety in the Army

Lightning Welds Soldier into His Sleeping Bag