Feature

New Machines and Gadgets

Part Played by Injury in Cancer Is Explained

First Glances at New Books

Front Matter

New Vaccine Developed to Protect from Distemper

New Hope for Polio

Structure Governs Use

Brief Malaria Treatment

[Photograph]: Lunch Box

Decline in TB Death Rate Almost Halted in Cities

TNT Danger Reduced

[Photograph]: Motor for Aircraft