Feature

Killing Back Yard Wasps Is a Tricky Business

Stopped Heart Beats

Science Youth Program Grows

Youngsters See Moon Smaller as It Rises

Books of the Week

Auto Exhaust Smog May Be Cut by Mixing Device

NASA Asks Radio Hams Not to Endanger Tests

Farming Becomes Business

New Short-Wave Radio Has Dual Transmission

New Machines and Gadgets

Fall Is School Science Time

[Photograph]: Hypersonic Wind Tunnel