Feature

Front Matter

Steel-like Glass Permits Centrifuge Observations

German Scientist Confirms Existence of Neutrons

Booklists of the A. A. A. S.

Which Was the First Steamboat? “A Classic of Science”

Lost in Space: Our Sun’s Twin

In Science Fields

Ancient Sun-Hole Device Added to Famous Calendars

Restriction Urged on Use of Poisonous Thallium

[Photograph]: Saving Young Eyes

Nature Rambling: A Miner for Worms

Men Attacked by New Brain Disease of Horses