Feature

Doubling Navigator’s Work with More Space, Equipment

Books of the Week

New Machines and Gadgets

Front Matter

Blood Safety Questioned

Hollywood Tricks Do Not Aid Film Learning

Grinding Tough Materials Easy with Liquid Nitrogen

Corporation Reports Understood by 1 out of 4

Armed Forces Test Valid

Two Medical Firsts

[Photograph]: Anti-Subs

Plane Wings without Rivets from New Forging Process