Energy Policy in the U.S.
The President's appeal for U.S. energy self-suflciency by 1980 cannot be regarded as realistic. The long-range options that are open to the nation are here considered in a “taxonomic” approach...
Features
Electrochemical Machining
Hard alloys are difIcult to cut into complex shapes by conventional machining. They can be worked to a smooth finish in an electrolytic cell where the hard metal is the anode and the tool is the cathode...
The Nervous System of the Leech
A repetitive array of ganglia with a few cells constitutes this simple central nervous system. Study of the cells' properties and connections explains certain behavioral reflexes and shows how they are modified...
The Cell Cycle
What happens in the living cell between the time it is born and the division of another cell and the time it divides again? New methods of investigation reveal four phases in the cycle
The Age of the Elements
Study of the fomation and spontaneous decay of radioactive nuclei can reveal when certain of the elements were created. From this information one can infer the age of the universe
The Perception of Disoriented Figures
Many familiar things do not look the same when their orientation is changed. The reason appears to be that the perception of form embodies the automatic assignment of a top, a bottom and sides...
The Physics of the Bowed String
What actually happens when a violin string is bowed? Modern circuit concepts and an electromagnetic method of observing string motion have stimulated new interest in the question
The Astrolabe
This scientific instrument of the Middle Ages was used for both astronomical and terrestrial observations. It also served as an analogue computer, particularly for determining the local time...
Departments
50 and 100 Years Ago, January 1974
Science and the Citizen, January 1974
- Letters
Letters to the Editors, January 1974
- Recommended
Books, January 1974
- Mathematical Recreation
Mathematical Games, January 1974
- Amateur Scientist
The Amateur Scientist, January 1974
- Departments
The Authors, January 1974
Bibliography, January 1974
