translation by Eden and Cedar Paul of most of Iltis's Johlann Mendels Leben, Werk und Wirkung (Berlin: Springer, 1924). I have also drawn from: EDWARD 0. DODSON, Mendel and the Rediscovery of His Work, Scientific Monthly, 81 (1955), 187-195. EDITORIAL Centenary of Mendelism, Endeavour, 24 (1965), 2. BENTLEY GLASS, Establishment of Modern Genetical Theory as an Example of Interaction of Different Models, Techniques, and Inferences, in Scientific Change, edited by A. C. Crombie (New York: Basic Books, 1963), 520-541; by J. S. WILKIE, 597-603; author's reply, 619-621. JAMES R. NEWMAN, Commentary on Mendel, The World of Mathematics, Vol. 2 (New York: Simon and Schuster, 1956; paperback edition, idem., 1960), 932-936. ERICH TSCHERMAK-SEYSENEGG, Rediscovery of Mendel's Work, Journal of Heredity, 42 (1951), 163-171. (Originally simply the ancestral name was added, and he became von Tschermak-Seysenegg or Seysenegg after his father, Gustav Tschermak (1836-1927), a distinguished mineralogist, was enobled in 1907). [9] G. MENDEL, Versuche uber Pflanzenhybriden, Verhandlungen des naturforschenden Verein in Briinn, IV (1866), 3-47; facsimile reproduction in Journal of Heredity, 42 (1951), 3-47. German reprint, edited by E. Tschermak, in Ostwald's Klassiker der exakten Wissenschaften No. 121 (Leipzig: Englemann, 1901). English translation by the Royal Horticultural Society, in Plant-Hybridization, Journal of the Royal Horticultural Society, 26 (1901), 1-32; reprinted, with footnotes added and minor changes suggested by Professor William Bateson (1861-1926), in W. BATESON, Mendel's Principles of Heredity, a Defense (Cambridge: Cambridge University Press, 1909), 4095; which reprint has, in turn, been reprinted in GREGOR MENDEL, Experiments in Plant-Hybridization (Cambridge, Mass.: Harvard University Press, 1948), 1-41, and in Classic Papers in Genetics, edited by J. A. Peters (Englewood Cliffs, N. J.; Prentice-Hall, 1959), 1-20, with excerpts in [8], NEWMAN, 937-949. [10] CARL CORRENS, Gregor Mendels Briefe an Carl Nageli (1886-1873), Abhandlungen der koniglichen Sichsischen Gesellschaf t der Wissenschaften (mathematische-physicalische Klasse) XXIX (1905), 189-265; English translation, Genetics, XXXV (1950), No. 5, Pt. 2, 1-29.