Feature

Trap for Silverfish Is Simple but Effective

Men Who Break in Army Life Problem to Army Physicians

Front Matter

Transfusions of Old Blood May Cause Reaction

German Shrub May Yield Gutta-Percha

In Science Fields

[Photograph]: Learn Engine Test

Public Health Prevention Fights against Plague

First Glances at New Books

Power Apparatus Tested in “Arctic” Laboratory

Once Wasted Cottonseed Hulls Make New Plastic

Conference Recommends $1,800,000 Anti-Plague Fund