Word: occured
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Dates: during 1940-1949
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...been creating mutations of plants (and animals) with X-rays (TIME, April 14). Such previous mutations were caused by the ionizing-or "electrifying" -effect of X-rays on the cell's chromosomes, kneading these heredity-determining units into unusual patterns and thus producing freakish plants which would seldom occur in nature...
...Many maladies which occur as epidemics in the U.S. are endemic (permanent) in North China. Scarlet fever smolders constantly. Also common: typhoid, diphtheria, erysipelas, meningitis, mumps, encephalitis, amebiasis (infection of the intestines by amebae...
...Although rheumatic heart disease is very common, the fever which accompanies this malady in the U.S. is rarely seen in North China. Another strange fact: the symptoms of high blood pressure very often occur in Chinese whose blood pressure is, by U.S. standards, very...
...Owing to the war which will cause many of this year's Seniors to complete the requirements for their degree at mid-years, there will doubtless be a number of vacancies which will occur in the Houses at that time...
...This means that those who are interested in House membership should secure application blanks at the office of the Secretary for Houses, 16 University Hall, in order to be placed on the Waiting List and be notified as these vacancies occur...