Feature

Bureau of Standards Urges Use of Informing Labels

First Glances at New Books

Front Matter

Artificial Radioactivity Produced for First Time

Czar’s Books, Rare Costumes Come to Philadelphia Museum

Study of Pituitary May Yield Thyroid Disease Treatment

Air Raid Menace Debunked by Soldiers and Scientists

Rare African Antelopes Mounted in Field Museum

Zinc-Acid Reaction Yields Heavy Hydrogen

Only American Observer of Eclipse Tells Plans

Lion’s Tooth Called First Musical Instrument

Whetstones Contain Ancient Climate Record