Feature

Books of the Week

Sound Reproduction More Efficient with Ceramic

Airliner Can Be Dropped 10,000 Feet in a Minute

New Machines and Gadgets

Front Matter

Radio Can Gage Radiation

Medical Aid from Lemon

Shine Taken from Pants by Permanent Waving Fibers

U. S. and British Atoll Borings to Be Compared

New Lighted Guide Path

Giant Ape-Man Fossils

[Photograph]: Quintuple Speed of Sound