Feature

Peepsight for Firearms Patented by Garand

Better Machine Harvester for Sugar Beets Invented

New Machines and Gadgets

Just off the Press

Front Matter

Microbe Rodent Killer

[Photograph]: Model Launching

Synthetic Sapphire Now in Production in U. S.

Army Insecticide

Hot-Water Mining Method for Potash Salt Invented

Infra-Red Rays Penetrate Smoke in the Atmosphere

Most Used Telescope