Dated Chimpanzees
Yale's Ape Colony, in Florida, is a Laboratory in Which Discoveries Directly Applicable to Man are Being Made on Man's Closest Relative, the Ape
Features
A Faster Army Rifle
Garand Semi-Automatic Rifle Adopted by U. S. Army, Self-Loading, Fires Clip of Eight Cartridges, More Rapid Fire, Gun Held on Target
Bubbles
A Fascinating Little Experiment Reveals a Surprise and Later May Lead to Some Utilitarian Purpose
Up From the Ashes
New York World's Fair 1939 a Glittering Cinderella, Engineering Difficulties of Filling in and Building Upon Ash-Filled Swamp Muck
Test Your Soil
Home Gardener or Commercial Grower May Test Soil With Simple Kits, Grow Better Plants
Powder Metallurgy
Tungsten Filaments Started It, Now Superior "Alloys" Made Without Melting, Components Retain Identity, Can Alloy Metals, Non-Metals
The Amateur's Seismograph
Instructions for Building and Operating in the Owner's Cellar an Instrument which Will Record Quakes from the Most Distant Parts of the Earth
From Logs to Plywood
"Unwinding" Trees, Stronger Lumber, Made Possible by Research, Co-operative Efforts
Sodium Skies
Recent Research Indicates that a Large Part of the Illumination We Commonly Designate as Starlight Originates in the Earth's Upper Atmosphere
Departments
50 Years Ago, February 1939
- From the Editor
Our Point of View, February 1939
- Recommended
Books Selected By The Editors, February 1939
- Departments
Pattern of a Golfer—by Photography
American Archeologists in Ancient Athens
Largest Steam Hammer, X-Ray "Candid Camera" Snaps Human Chest, and more
Current Bulletin Briefs, February 1939
Camera Angles, February 1939
Camera Angles Round Table, February 1939
Telescoptics, February 1939
Legal High-Lights, February 1939
