An Analysis of Television Programs
What is the total picture they present and how much of it may be considered educational? U. S. educators have collected some data on the question to support their plea for educational TV channels...
Features
Zirconium
Extraordinarily resistant to heat, corrosion and hard radiation, yet malleable and ductile, the metal meets some of the stern engineering requirements of nuclear reactors and jet engines...
Meteors
The stony and metallic particles that enter the earth's atmosphere can now be perceived day or night and rain or shine by radio echo
The Ultracentrifuge
By spinning a rotor at very high speed it can generate enormous gravitational forces. It has been used notably to study large molecules by causing their sedimentation.
The Fertilization of Flowers
The rich and beautiful variety of floral color, odor and anatomy is due to the evolutionary adaptation of plants to the specialized creatures that pollinate them
Moving the Obelisk
The Egyptians left no record of how they transported their massive stone shafts, but an engineering classic tells how the feat was accomplished by man and horse power in 1586
Calcium and Life
The 20th element is responsible not only for the structure of bones and teeth but also for the firmness of soft protoplasm
Animal Intelligence
Philosophers and pet lovers have debated the subject for centuries; now psychologists have developed some objective tests to rate the capacity of various species
Departments
50 and 100 Years Ago: June 1951
Science and the Citizen: June 1951
- Letters
Letters to the Editors, June 1951
- Recommended
Books
- Amateur Scientist
The Amateur Astronomer
- Departments
Bibliography
