Feature

Engineers to Silence Tires, Mufflers and Power Roar

Woodpeckers Steal Wasps’ Nests to Store Acorns

First Glances at New Books

Front Matter

Chance Discovery May Yield Metal-Plating Method

Stratosphere under Heavy Attack by Scientists

Stellar Looking-Glass Slowly Cooling

Superiority Predicted for Rotating Wing Aircraft

Man Made Tools in Dim Age “At Present Unspecified”

Water Snakes in Zoo Had Amebic Dysentery Epidemic

Huge Photographic Map of Indian Lands to Be Made

Hardest Known Cosmic Rays Found in Iron Mountain