Feature

Watch for Vitamin A in Butter Substitutes

White Men Seem Stingy

Resins Improve Method of Softening Water

Detect Camouflage

New Machines and Gadgets

Why Stars Black Out

Women Need Good Training and Living Conditions

Copernicus Honored

[Photograph]: Microscopic Microscope

New Comet Discovered by Finnish Woman

Front Matter

War: It’s Technical