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Academy acid active Advancement Agriculture American animals annual appear application Association awarded become biological cancer cause cells cent changes chemical chemistry City College committee continue course culture determined direction director discussion disease Duke University effect elected engineering established experiments fact field give given growth held Hospital human important increase indicate industry Institute interest International John knowledge laboratory lecture light living March material means measurements Medal Medical medicine meeting ment methods Michigan Museum nature observed obtained officers organization original period physical plants possible present president problems produced professor progress received recent relation reported School scientific secretary session Society solution strains surface tion treatment United University various Washington York