Feature

First Glances at New Books

C. O. Guinea Pigs

New Machines and Gadgets

Front Matter

Bombsight Announced

New Treatment Developed for “March Fractures”

Gipsy Moth Wiped Out

Diabetes Will Outrank T. B. as Cause of Death

Botanical Clue

[Photograph]: Laboratory Tools

Light Artillery May Have New Recoil Apparatus

Propaganda Weapons