Feature

Test for Food Additives

Blowflies Menace Sheep

U. S. Air Force Expands Science Fair Cooperation

First Spaceman Cooled by “Pulsating Sponge”

Lamb in Germfree Lab

[Photograph]: New SAC Bomber

Fuel Cell Report Is Gone Again

Urge Space Probe to Test for Possible Martian Life

New Machines and Gadgets

Nature Ramblings: Telling up from Down

Front Matter

Machine Translation Seen