Feature

Sensitive Instruments Extend Study of Distant Stars

China’s Civilization Said to Be Only 4,000 Years Old

The Monotype: “A Classic Invention”

Sea Bottom North of Japan Shaken by Third Earthquake

Einstein Develops Quantum Mechanics in Latest Paper

Chinless Skeleton Puzzles Scientists

Yellow Sodium Light Effective Outdoors

No Stocks, Bonds or Debts under Rule of Technologists

Nature Ramblings: Spring’s Uncouth Messenger

First Glances at New Books

Front Matter

Two Drugs Found Which Cure Horrible Disease of Weakness