Feature

Nature Ramblings: Snow-on-the-Mountain

Explosive Used to Produce Earth Tremors Artificially

First Glances at New Books

Front Matter

Evidence Obtained That Space between Stars Not Transparent

New Photo Tube Measures Temperature in Furnace

[Photograph]: Bareback

Accepted Theory of Sense of Balance May Be Revised

[Photograph]: Largest of His Time

New Method Measures Speed of Electrons in Dense Solids

Activity of Pituitary Gland Basis of Test for Pregnancy

Industrial Hygiene Urged to Lengthen Adult Life