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Features

Chemical Agriculture

Farming is being revolutionized by new fertilizers, insecticides, fungicides, weed killers, leaf removers, soil conditioners, plant hormones, trace minerals, antibiotics and synthetic milk for pigs

By Francis Joseph Weiss

The Spider and the Wasp

About the odd relationship between the tarantula and the giant wasp Pepsis. Although the tarantula can easily kill Pepsis, one species permits the wasp to sting it and lay an egg in its body

By Alexander Petrunkevitch

The Rhind Papyrus

In 1700 B. C. an Egyptian scribe named A'h-mosè set down his "knowledge of existing things all," a document which is now the principal source of what we know of Egyptian mathematics

By James R. Newman

Asthma

The sickness that makes its victims gasp for breath has definite physiological causes. These are often amplified by psychological mechanisms, suggesting that the two aspects be treated together

By William Kaufman

Microwaves

They are radio waves that range in length from about a quarter of an inch to two feet. Investigated during the war for their utility in radar, they are now widely applied in communication

By J. R. Pierce

Running Records

In which a curve is plotted on the basis of the best human performance at each competitive distance, suggesting what marks are the most likely to be surpassed and by how much

By M. H. Lietzke

On the Origin of Glaciers

Numerous theories have been devised to account for the occasional advance of the great ice sheets. Most plausible to the geologist is a hypothesis that relates the growth of glaciers and mountains

By Charles R. Warren

D'Arcy Thompson

The British biologist who died four years ago at 88 was a man of unique mold. His great book On Growth and Form dealt with all life in terms of physics and mathematics

By John Tyler Bonner

Departments

  • 50 and 100 Years Ago: August 1952

  • Science and the Citizen: August 1952

  • Letters

    Letters to the Editors, August 1952

  • Recommended

    Books

  • Amateur Scientist

    The Amateur Scientist

  • Departments

    Bibliography

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