Feature

200,000,000-Year-Old Track Tells Tale of Insect Tragedy

American Negroes Came from Small Part of Vast Africa

New York to Have Third Planetarium

Nature Ramblings: The Nymphs’ Flower

Protons Seen as Source of New Atomic Particles

Seven Mummies from Texas Cave Brought to Smithsonian

First Glances at New Books

Front Matter

Successes in Atom Smashing Evaluated by Dr. Millikan

Rare Butterfly Specimen Is Half Male, Half Female

Neon Atoms Smashed, Producing Rare Isotope

American Physique Superior Because Better Food Eaten