Feature

Method Devised to End Telltale Vapor Trails

Many Early Miscarriages

New Laboratory Tool Analyzes Low Pressures

Gumifrices Tested

Of Men and Mice in Space

Books of the Week

Cancer-Resistant Chickens

New Machines and Gadgets

Make Valley Fever Vaccine

Arsenic Linked to Cancer

Front Matter

Polio Shot Effective in Four-Way Vaccine