Word: ultraviolet
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Dates: during 1930-1939
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...reasoned Drs. Kenneth Cooley of Rochester and Kristian Gosta Hansson of Cornell. To physical therapists convened in Cincinnati last week Dr. Hansson described a machine designed by himself and his associate which pumps blood out of one arm, irradiates it with germicidal ultraviolet rays, puts it back in the other arm. Citrate of sodium introduced into the blood as it leaves the vein prevents coagulation. ''It is for the future," said Dr. Hansson, "to show what can be accomplished. One difficulty in experiments was that we didn't know the safe amount of radiation to give...
...start with derivatives of coal. All end, by means of different patented processes, with a substance called methyl methacrylate. This can be molded into lenses, rods, sheets or odd shapes. It is transparent to ultraviolet light as well as to the whole visible spectrum. It is lightweight, slightly flexible, can endure pounding, resists corrosion. It is softer than glass and scratches easily. But it can be repolished to its original brilliancy and translucency...
...failure to penetrate beyond a transition zone of light and heavy atmosphere, he expressed a conviction that with the accessibility to a greater elevation a more distinct transformation would be evident. Results of the recent flight yielded valuable specimens of ozone, a high oxygen layer which deflects ultraviolet rays, and revealed the presence of living spores and bacteria at the highest altitudes...
...traced a consistent parallel which would show that sunspots cause war, prosperity, disease epidemics or drought. Astronomers agree, however, that at times of sunspot intensity more ultraviolet radiation comes from the sun to earth, the air averages about one degree cooler, slightly more rain falls and there are disturbances of the terrestrial magnetic field. At such times ordinary radio reception is more troubled by static. But a U. S. Bureau of Standards scientist has found evidence that ultra-short-wave reception is better in the daytime when sunspots are rampant (TIME...
...Ultraviolet radiation has a propensity for knocking electrons off molecules and thus creating ions-electrified particles. In the tenuous upper atmosphere of earth, far higher than any balloon has ascended, there are several layers of such ions which increase in density during sunspot peaks. This is to be expected since sunspots are accompanied by heavier ultra violet bombardment. These electrified layers serve to deflect most radio waves, curve them around the bulge of earth. In radio's pioneer days, when only one layer was known, it was called the Kennelly-Heaviside layer after its discoverers. Now the electrified region...