Feature

Model Indicates Cosmic Ray Path about the Earth

Shocks Drive out Borers from Infested Elm Trees

Nature Ramblings: Assisted Competition

New Methods of Observing Allow Better Forecasting

First Glances at New Books

Front Matter

Eclipse! June 19, 1936

Drought Menaces Wildlife in Western National Parks

New Dust Bowl Forming in Drought-Stricken Area

Drought, Dust and Pests, but Anyway No Prairie Fire

Electrical Changes in Body Controlling Factor in Growth

Transplanted Glands Make Giants in Later Generations