Scientific American Magazine

World's Finest Warplanes, Built to High Standards and of Superior Material, What the Various Types are Designed to Accomplish

Corrosive Sulfuric Acid, Indispensable in Peace and War, Used in Most Industries, Annual Production Runs into Millions of Tons

Pacific Plane Service Provides Passage for Insect Pests, Hawaiian Farms Threatened, Midway and Canton Islands Have Pest Control Stations

Artifacts Found in Basal Layers of a Cave in New Mexico Give Evidence of Earliest Known Man in America, But Just Who Was That Man?

Physicists Talk Down Some Fabulous Claims, But New Findings May Alter the Picture, Prediction Probably Unsafe, Immediate Development Unlikely

After Ten Years the Planet Pluto's Mass Has Been Determined, Denser, Darker, More Massive than Was Expected, Laborious Computations

New Electron Microscopes Now Being Developed Far.