Feature

Hope to Extract More Oil

New Germ-Fighting Tactics

Later Years Are Rated Special Concern of Women

Nova Formed by Big Shell Blown off Star’s Surface

New Machines and Gadgets

Black Not Always Black

[Photograph]: Direct Reading Gauge

Books of the Week

Glue Mosquitoes to Wires for Flight-Motions Study

Irradiated Seed Deforms

Chemicals Check Bleeding in Many Body Disorders

Guggenheim Medal Goes to Aircraft Engineer