Feature

Efficiency Eliminates Creativity for Students

Mohole Drilling Tests

Gibberellin for Animals

Tobacco-Less Cigarettes with Improved Taste

Mohole Project Gets $6.70 from Cave Creek

Home for the Birds inside a Tractor

New Machines and Gadgets

Nature Ramblings: Built-in Education

Front Matter

Pauling on X-Ray Dangers

New Table Shows Hourly Meteor Rates

Chlorophyll Synthesized