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Show X-Ray Used on Flies to Help Human Ra.ce Washington Files which have long been held In bud esteem as spreaders of disease nre about to do their bit in helping the humun race. They are being used now for studies of the effect of X-rays on future generations. In files, the harmful effects of these rays appear In the third and fourth generation. Dr. Mary B. Stark of New York city reported recently. She has exposed flies to X-rays for varying lengths of time. While the individuals exposed continue con-tinue to grow and breed, their descendants de-scendants die off. Doctor Stark believes be-lieves this is because the reproductive cells of the grandpa rent or great-grandparent great-grandparent flies were Injured by the rays This Injury Is Inherited snd finally causes death, in this same way cancer muy be produced In third and fourth generations of flies Doctor Stark believes that the experiments ex-periments on flies will throw some light on this problem in human beings. Her theory Is not accepted by all scientists, however. Because the human hu-man nice breeds slowly. It will be some time before the Inherited efforts ef-forts of X-rays can be noticed In man. |