Scope and Contents A Biologic and Taxonomic Study of the Genus Gymmnosporangium, Kern, Frank Dunn, From the Bulletin of the New York Botanical Garden, vol. 7, no. 26, 1911, pp. 391-483. Submitted in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy, in the Faculty of Pure Science, Columbia University. The Rusts of White and Red Clover, Kern, Frank D. From Phytopathology, vol. 1, no. 1, February, 1911, pp. 3-6. The Rusts of Guatemala - Part II, Kern, Frank D....