Feature

Eiffel Tower Is Lighted to Honor Paris Exposition

First Glances at New Books

Front Matter

Miniature Airplanes Now Fly Freely in New Test Tunnel

Aerial Research Race on; U. S. Supremacy Menaced

New Equipment to Be Used on June Eclipse Expedition

June Brings Rare Eclipse

New Turbine Pumps Rescue Water-Flooded Coal Mines

In Science Fields

Self-Torture, Normal in Children, May Become Habit

Insulin Cuts Short Circuits in Brain of Mental Patient

Attempt to Split Neutron a Failure at Cavendish