Feature

One-Celled Animals Shine under Ultraviolet Light

New Mineral Shines like Raven’s Wing

Cosmic Ray Energy Difficult to Measure

Two Mechanical Men Explain Body’s Mechanism

U. S. Wheat Crop to Be Shortest in Generation

Quotations Explain Purpose of Science

Saw Replaces Explosives in Coal Mining

Front Matter

Scientists Penetrate Unknown Surrounding Newborn Babies

Prediction of Tidal Wave Forestalls Harbor Damage

New Inventions Make Possible More Accurate Time Keeping

Thousands of Animals Used Sponge as House