Feature

Front Matter

Plant Patents Necessitate Use of Color Printing

Millions Wasted Yearly for School Ventilation

Predicting Undiscovered Elements: Part One: “A Classic of Science”

Navy’s New Airship Hangar Will Be Built in Sections

Insects Better than Rats for Use in Vitamin Tests

Eat Rather than Brush to Develop Sound Teeth

Grotesque Figure Dug up at Olynthus Shakes Art Theory

New Theory Would Explain Cosmos’ Unexpected Ways

Tendency to One Sex May Be Hereditary in Families

First Glances at New Books

Sulphur to Be Taken from Crater of Mexican Volcano