Feature

American Association Elects New Permanent Secretary

Growth of Plants Stimulated by Proper X-Ray Treatment

Atom Building Keeps Stars Shining, Says A.A.A.S. Head

Millikan and Compton Debate Cosmic Ray Facts and Theories

Secretion from Crustacean Eyes Causes Color Changes

Beginning and End to Universe May Fall before New Physics

Man Had Toothache 50,000 Years Ago

Front Matter

Economic Revolution Seen as Atom Releases Energy

Catastrophic Earthquake Rocks Interior of China

Chemist Who Works in Library Wins Coveted Award

Erratum: Nature Ramblings: ‘Simmons