Feature

Echo Depth Finders Move in on Old Izaak Walton

No Machine like Brain

Supposed Breast Cancer Shows up as “Bobby Pin”

Yuma and Folsom Men Probably Contemporaries

No Drop in Intelligence

Avoiding Mass Murderers

New Guide on Metals out for Aircraft Designers

Noah’s Ark Fiction?

New Machines and Gadgets

[Photograph]: Helicopter Gets Floating Feet

Nature Ramblings: Natural Inventions

Cortisone May Aid Allergy