1940 SECOND SYMPOSIUM Warren H. Lewis, Chairman Paul Weiss, Secretary Leigh Hoadley, Treasurer N.J. Berrill Philip R. White Edmund W. Sinnott 1941 THIRD SYMPOSIUM Edmund W. Sinnott, President Paul Weiss, Secretary Leigh Hoadley, Treasurer O.L. Sponsler Benjamin H. Willier Philip R. White 1942 FOURTH SYMPOSIUM Paul Weiss, President Kenneth V. Thimann, Secretary J. Walter Wilson, Treasurer O.L. Sponsler Benjamin H. Willier Edmund W. Sinnott 1943-1944 NO SYMPOSIA Benjamin H. Willier, President J. Walter Wilson, Secretary-Treasurer O.L. Sponsler George S. Avery, Jr. Harry S.N. Greene Kenneth V. Thimann 1945 FIFTH SYMPOSIUM Benjamin H. Willier, President J. Walter Wilson, Secretary-Treasurer O.L. Sponsler George S. Avery, Jr. Harry S.N. Greene A.F. Blakeslee

1946 SIXTH SYMPOSIUM A.F. Blakeslee, President J. Walter Wilson, Secretary Francis O. Schmitt, Treasurer Harold B. Tukey George S. Avery, Jr. Harry S.N. Greene 1947 SEVENTH SYMPOSIUM Ross G. Harrison, President George S. Avery, Jr., Secretary Francis O. Schmitt, Treasurer James W. Marvin Harry S.N. Greene 1948 EIGHTH SYMPOSIUM Francis O. Schmitt, President Edward W. Shrigley, Secretary Lindsay M. Black, Treasurer James W. Marvin Ross G. Harrison 1949 NINTH SYMPOSIUM Ralph H. Wetmore, President Edward W. Shrigley, Secretary Lindsay M. Black, Treasurer James W. Marvin Ross G. Harrison Viktor Hamburger

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