September 22, 1911 Dr. L. H. Pammel Iowa State College, Dept. of Botany, Ames, Iowa. My dear Dr. Pammel: I wish to thank you for a copy of your Talk on Weeds. I have found it exceedingly interesting and instructive. With my very best wishes to yourself and family, I am, Yours very truly, Geo. W. Carver Director Dept. of Research & Experiment Station