Feature

Cerium Group of Rare Earths: “A Classic of Science”

Old Terraces in Arizona Tell of Indian Farming

Intensely Sweet Substance Insipid after Splitting

False Fiction Families

First Plant Patent Granted Protects Everblooming Rose

Good Reports Received from Meteor Observers

Front Matter

X-Ray Tube of More than Million Volts Installed

Breaking Point of Ships Is Learned through Actual Tests

Synthetic Antiseptic Found Effective against Hookworm

First Glances at New Books

Sky’s Blue Believed Caused by Electron Streams from Sun