Feature

Czar’s Books, Rare Costumes Come to Philadelphia Museum

Front Matter

Artificial Radioactivity Produced for First Time

Research Can Point Way to Better, Less Costly Navy

Zinc-Acid Reaction Yields Heavy Hydrogen

In Science Fields

Air Raid Menace Debunked by Soldiers and Scientists

Defective Plumbing Menaces Health in Cities

100,000-Year-Old Carcasses Explain Black Sea Poisoning

Study of Pituitary May Yield Thyroid Disease Treatment

Mound Builder Home Discovered in Louisiana

Hardest Known Cosmic Rays Found in Iron Mountain