Feature

New Machines and Gadgets

First Glances at New Books

Front Matter

D. C. Health Officer Institutes Special Measures

Hypnotically Drugged Troops May Be Next Development

Pilot Plants to Test Methods of Producing Sponge Iron

[Photographs]: In the Scrap

Rifle Bullets That Flash Help Marksman Correct Aim

Wire-Dangling Rocket Not a New Weapon

Ideas from Talent Search Winners Given to Government

Smallpox Now at Lowest Ebb; Danger Seen in War Shifts

Possible Rubber Substitutes from Soybean Oil Tested