Feature

Population Boom Called World’s Biggest Problem

[Photograph]: Reverse Osmosis

Front Matter

[Photograph]: Streamlined Hull

Books of the Week

Tobacco-Smeared Mice Found to Develop Tumors

[Photograph]: Electronic Librarian

Sea Intelligence: The Dolphin

Probe Planned on Changing the Weather

Underground Atom Study Curbs Radiation Dangers

Scientists to Swing out in Giant Centrifuges

Easter Island Study Set to Precede Airfield