Feature

Scientist Suggests Means for Keeping U. S. Lead

New Machines and Gadgets

Alloy May Give 100 MPH Boost to Jet Planes

Leukemic Genes Different

Better Switches Needed

Camera Takes Millions of Pictures per Second

Comet Remains Visible

Chemists Stress Safety for Labs and Factories

Danger to Streams

Tiny Memory Device Is Switch Changed by Light

New RNA Species Found

Tough New Plastic Can Replace Metals