Feature

Chemical from Wells Makes Ship of the Sky

Radio Knife Invented as Aid to Surgeons

Cod Liver Oil Now Used as Wound Dressing

New Test Predicts Engineering Ability

Our Cosmic Island Shaped like Ball, Not like Disk

Training of Deaf Child Should Be Started Earlier

Nature Ramblings: Woodman, Spare That Dead Tree

Front Matter

Right-Handed Rats Made “Southpaws” by Brain Lesions

[Photograph]: A Hat’s Ancestral Tree

Great Dust Storm Formed from Corn Belt Top-Soil

Aviators Need Carbon Dioxide at High Altitudes