TITLE: SCIENTIFIC AMERICAN
[ See FULL contents below!]
ISSUE DATE: December 1968; Vol. 219, No. 6
CONDITION: Standard sized magazine, Approx 8½" X 11". COMPLETE and in clean, VERY GOOD condition. (See photo)

IN THIS ISSUE:
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ARTICLES:
ECONOMIC GROWTH IN TIlE U.S.S.R.. by Raymond P. Powell. Analysis by U.S. economists indicates that its rate is From 5.4 to 6.7 percent.

THANSPLANTED NUCLEI AND CELL DIFFERENTIATION. by J. B. Gurdon. Putting various nuclei in egg cytoplasm helps to clarify hos' cells differentiate.

RADAR SIGNALS FROM HYDROXYL RADICALS. by Alan H. Barrett. These signals from space seem to he generated by a maser-like amplification.

SEA-FLOOR SPREADING, by J. R. Heirtzler. This horizontal motion of the earth's crust seems to account for continental drift.

FOG, by Joel N. Myers. Ways are being found not only to break it up but also to prevent its formation.

THE RELATIVISM OF ARSOLUTE JUDGMENTS. by AIIen Parducci. The same event can give pleasure or displeasure depending on the circunistances.

RESONANT COMBUSTION IN ROCKETS. by J. C. Sotter and C. A. Flandro. One of the main problems in the design of rocket engines is to overcome instability.

HUMAN STONES. by Kathleen LonsdaIe. The calculi that form in the body have an odd distribution in geography and time.

DEPARTMENTS:
Letters.
And 100 Years Ago.
The Authors.
Science And The Citizen.
Ii 2Mathematical Games.
The Amateur Scientist.
Books.
Annual Index.
Bibliography.


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