Feature

Sound-Absorbing Plywood Has Textile-Backed Surface

New Machines and Gadgets

Front Matter

Test for Liver Disease

Preparedness Lack Scored

Urge All Students Be Taught How to Drive

Search for Remains of Prehistoric First Americans

Grafts Repair War Wounds

Nitrogen Packaging Keeps Foods Fresh a Longer Time

[Photograph]: Fire Ball

Rescue Work Not Stopped by Radiation from Atom Bomb

Human Thrombin Recalled