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About Medford mail tribune. (Medford, Or.) 1909-1989 | View Entire Issue (Nov. 17, 1960)
THURSDAY. NOVEMBER 17, 1SG0 MEDFOHD MAIL TRIBUNE. MEDFORI5. ORE. Jrail of Bubbles :Tells Tale About Atomic Particles Washington -(Science Serv--Ice) - A trail of bubbles that tells the tale of atomic par ticles is the Idea for which Dr. Donald A. Glaser of the University of California. Ber keley, won the I960 Nobel Prize in Physics. Glaser conceived the idea that the bubbles in a liquid .could be photographed to show the fleeting tracks of atomic particles. He perfect ed a radiation detector, the bubble chamber, based on this idea in 1954. The bubble chamber made possible the mass production of simple photographs show ing what happens in atomic collisions. Bubble chambers filled with various liquids are placed in the beams of atomic "bullets" from virtually every atom-smashing machine in the world. From the bubble chamber and other photographs of atomic collisions, scientists are learning more about struc ture of the atom and how it is held together. Only Two Ways Until invention of the bub ble chamber; scientists had only two ways of seeing and measuring the debris from atomic collisions. One was the cloud chamber, the other pho tographic emulsions. Glaser began work on the new approach that ended in 'the bubble chamber in 1952. "It occurred to me," he said, "that a superheated liq uid, like a supersaturated va por, might provide a medium that could be triggered by a small stimulus to yield a very large effect. "Chemists already knew that a very pure liquid may be heated above its usual boil ing point without boiling. A bit of broken glass thrown into such a liquid will cause it to erupt in violent boiling. "I wondered whether a fly ing atomic particle might, un der suitable conditions, trig ger microscopic bubbles that start the boiling process. If so, they might make a visible track which could be record ed by m e a n s of high-speed .photography. "I made a simple test. The technique worked!" , House Cats With Rabies Known to Attack Humans Washington -(Science Serv ice)- Cats, like dogs, can get rabies, and when they do, they attack humans. Researchers have examined 44 rabid house cats in Flo rida and none were known to attack other cats or domestic or wild animals. Humans bit ten or scratched by the rabid cats did not necessarily con tract the disease. j Apparently rabies is not j limited to domestic felines;! one case occurred in a bobcat. I .The disease has also been j found in horses, cattle, bats, j skunks, raccoons and foxes, ; as well as dogs. , Because a wide-scale vacci nation program- started 20 years ago has drastically re-j duced rabies in Honda dogs, researchers are curious about the source of infections. . Groups of infections in cats ;have occurred simultaneous ly with infections of foxes or raccoons in the same area. It ,is possible that raccoons will attack cats when provoked, 'but it is unlikely that a kitten would survive an attack by a dog, fox or raccoon without :being killed immediately. Small Mammal ' The infecting animal would have to be a small mammal .that showed no vicious be havior; otherwise, it would have been delected by now. .Mice and rats have been sus pected, but so far it has not been established that they are susceptible to rabies. High on the candidate list; is the bat, known to have a , natural rabies incidence of j about two per cent. Cats have , been known to play with dy-i :ing or rabid bats, and occa- sionally a mother cat will take I one home to her kittens. i . Further study is suggested! by the investigators. Drs.J James E. Scattcrday, Nathan j J. Schneider, and Arthur L. Lewis of the Florida State Board of Health, and Dr. Wil liam L. Jennings of the U. S. Fish and Wildlife service. The study, supported in part by grants from the National In stitutcs of health. 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