Feature

Find Diamonds Transparent to Ultraviolet Light

Training of Deaf Child Should Be Started Earlier

New Test Predicts Engineering Ability

Chemical from Wells Makes Ship of the Sky

Would You Join a Riotous Lynching Mob?

Front Matter

New Thymus Gland Extract Speeds Sex and Growth

[Photograph]: Spring: An Ironic Symphony

At Least Three Vitamins Still Await Discovery

Penetrating Rays Sprayed up from Thunderclouds

It’s Raining Radium: But Not Much

Dean of American Medicine Defined “New Public Health”