Feature

Vitamin D Forms Vary

Russia Far from Out

[Photograph]: Mars

P-47 Now in Production Fast and Hard Hitting

Front Matter

Better Not Alter Engine

No Shortage of Wool

Tetryl Causes Illness

Boom in Shark Fishing; Source of Vitamins

Gloves Do Not Protect Surgeon from Mustard Gas

Birth Rate Will Drop

Build Powerful Electron Whirler and X-Ray Machine