In Volume XVIII, Number 6, December, 1913, page 662, line 23 and following should read: Finally, artificial attenuation of the agent causing Chicken Tumor I, by heating, or glycerination, or storage after drying, has never so altered it that it will produce tumors resembling Chicken Tumor XVIII. The agents causing the two growths may nevertheless have some relationship to each other.
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Copyright, 1913, by The Rockefeller Institute for Medical Research New York
1913
