Feature

Boredom Causes Most Lost Time from Work

First Glances at New Books

Cavemen’s Idea of Magic Shown by Paintings

Nature Ramblings: Lovers of Open Fields

Sick Vegetables Described in New Publication

Swelling Marble Makes Trouble in Quarries

First Glances at New Books

Front Matter

X-Rays Can Speed up and Reverse Evolution

Treasure Unearthed from Maya Pyramid

Low Resistance in Cold Intrigues Engineers

Larger Families May Again Become Fashionable