Feature

40 to Meet in Washington

Eight Biotin Vitamins

New Vaccine Developed to Protect from Distemper

Aero-Medical Research Wins Jeffries Award

Front Matter

Substitutes Are Better

Rotary Diet System

In Science Fields

Part Played by Injury in Cancer Is Explained

Post-War Feeding Should Be Based on Scientific Advice

Laws Need Change

[Photograph]: Motor for Aircraft