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The Early Americans

The pattern of their movements some 10,000 years ago has been outlined by widely scattered clues and new determinations of their age. The second of two articles

By Frank H. H. Roberts

The Bevatron

It is one of three great machines now being built to accelerate protons to energies of more than a billion electron volts. With such accelerators physicists hope to learn more of the nucleus

By Lloyd Smith

People in Groups

Are there patterns of behavior common to every human organization? An account of studies in three aspects of the problem: communication, leadership and interaction

By David B. Hertz and Sandra Lloyd Lesser

The Common Cold

It is a subject fraught with folklore and a remarkable paucity of proved facts. Here is a summary of the four years of work at the famous Salisbury colds laboratory

By Christopher Howard Andrewes

Georgii Agricolae de re Metallica

A Renaissance genius was the earliest modern writer on mining and metallurgy

White Blood Cells v. Bacteria

Some new observations have settled an old argument as to whether phagocytes are primary or secondary antagonists of infection. It seems that in acute infection they are the first line of defense

By W. Barry Wood Jr.

Friction

One of the most familiar phenomena is one of the most difficult to explain. What is responsible for it: surface roughness, molecular cohesion or electrical attraction?

By Frederic Palmer

Windows

Because glass is transparent to some kinds of radiation but opaque to others, it can be used to trap solar energy. This will be a major method of heating in houses of the future

By Eugene Ayres

Departments

  • 50 and 100 Years Ago: February 1951

  • Science and the Citizen: February 1951

  • Letters

    Letters to the Editors, February 1951

  • Recommended

    Books

  • Amateur Scientist

    The Amateur Astronomer

  • Departments

    Bibliography

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February 1951

See the World from a Different Perspective

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