Feature

Hunting for “Radio Roof”

First Glances at New Books

Radio over Telephone Line

Modern Birds in Times of Mastodons

Nature Ramblings: “Bullheads”

Seldom-Seen Mercury in May Skies

Fourteen Elected to Science Academy

Front Matter

Liver Seen as Insulin Substitute

Oldest Weather Records

Foresees Infantile Paralysis Conquest

Hoover Given Medal