Feature

Supposed “Ghost” Comet Claimed to Be Real

Man Himself Is Feature of New Style World’s Fair

Population Problems Call for a Government Policy

Industrial Plants Loose $text{CO}_{2}$ but Green Plants Return It

Nature Ramblings: Paleolithic Planters?

Evidence of Human Artifacts Points to Earliest Existence

New Airplane De-Icers Approved by Air Commerce

First Glances at New Books

Front Matter

War May Save China from Evils of Overpopulation

“Tears of St. Lawrence” Can Be Photographed

Head of Public Health Service Urges War against Syphilis