Feature

New Machines and Gadgets

Front Matter

Overlooked Disease Cause

Hope of More Meat

Paricutin Is Laboratory

[Photograph]: Vary in Size

Japanese Oxygen Mask Generates Its Own Oxygen

Youth Can’t Be Kept

Still Have Jaundice

Hummingbirds Must Learn to Get Food from Flowers

Soviet Science Celebration

Suicide Rate in Germany Double What It Is in the U. S.