Feature

Ancient Rocks Identified by Two Trilobite Genera

Pueblo War Songs Link Indians with Far East

Draw-Casting New Trick in Making Copper Rods

Dead Men’s Heads Carved on Ancient Temple in Peru

Iron Masses under Meteor Crater Shown Magnetically

In Science Fields

Spring Comes

New Saliva Test Indicates Likelihood of Tooth Decay

Two National Soaring Meets Planned for Present Year

U. S. Joins 14 Other Nations Using Robot Radio Alarm

Animals of Cooler Regions Larger than Warm-Land Kin

Low-Cost Farm Unit Built Wholly of Steel