Feature

Method of Keeping a Journal at Sea: “A Classic of Science”

First Glances at New Books

Tracks of Cosmic Rays Seen by Experimenters

Ultraviolet Light Used in New Photographic Process

New Type of Frozen Fruit Being Developed

Speedy Particles Released as Cosmic Rays Smash Atoms

[Photograph]: Aerial Mapping with Five-Lens Camera

Electromagnetism Explained by Riemannian Geometry

Front Matter

Faint Nebulae May Be Most Distant Objects

Gravity and Electricity Are Merged in New Mathematics

Trees Will Die Unless Heavy Rains Fall