A dose of x-rays governed by the following factors induces a stimulation of lymphoid tissue in mice: spark-gap ⅞ inch, milliamperage 25, distance 8 inches, time of exposure 10 minutes. Within 4 days after this dose there appeared an abnormally large number of mitotic figures in the lymphoid tissue of spleen and lymph glands, indicating an acceleration of the proliferative activity of the tissue.
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Copyright, 1920, by The Rockefeller Institute for Medical Research New York
1920
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