Feature

Coal Miners’ Bronchitis Related to Cigarettes

New Aircraft Designed with Rotors, Jet Speed

Heavy Stars Possible Source of X-Rays

New Ideas and Gadgets

Doctors Are Reading

Front Matter

Better Use of Scientists

[Photograph]: Photographic Scanner

Physicists Needed to Meet Rising Demand

Goldwater on Missiles

Scranton on Automation

Slowdown Urged on Missile Defense System