Feature

[Photograph]: Low-Noise Amplifier

[Photograph]: Bulge in the Sea

U.S.S.R. Exports Doctors

Cutting Roses Can Help or Hinder Their Growth

Techniques Clue to Pre-Columbian History

Find Extra Chromosome

Power Mower Injuries Up

New Viruses Paralyze

Brain Waves Measure Depth of Natural Sleep

Books of the Week

[Photograph]: Missile Master

Study Russian Obstetrics