Feature

Tear Gas Effective as Killer of Insect Pests

Nature Ramblings: Ecologist at Work

Oil Discoveries in Nebraska Based on Success in Michigan

First Glances at New Books

Front Matter

Colchicine Used on Rabbits to Double Chromosomes

Abscessed Teeth Treated with Hot Sulfanilamide

[Photograph]: A Magnet

Friendliness May Act to Spread Influenza

Japan Sole Source of Agar, Important Biology Material

Cobra Venom and Curare Used for Arthritis

[Photograph]: Hair-Raising