Feature

In Science Fields

Geophysics Goes to War

Poison Gases May Be Used by Retreating Armies

Nature Ramblings: A Week for Wildlife

Science Clubs of America

Mass Immunization Urged Where Children Face Bombing

New Machines and Gadgets

New Blackout Bulb Developed by Army

First Glances at New Books

Front Matter

Infantile Paralysis Proved to Be Year-Round Disease

Statistical Methods Aid in Human Heredity Study