1940-1949

• Warren H. Lewis, Chairman
• Paul Weiss, Secretary
• Leigh Hoadley, Treasurer
• N.J. Berrill
• Philip R. White
• Edmund W. Sinnott

• Edmund W. Sinnott, President
• Paul Weiss, Secretary
• Leigh Hoadley, Treasurer
• O.L. Sponsler
• Benjamin H. Willier
• Philip R. White

FOURTH SYMPOSIUM

• Paul Weiss, President
• Kenneth V. Thimann, Secretary
• J. Walter Wilson, Treasurer
• O.L. Sponsler
• Benjamin H. Willier
• Edmund W. Sinnott

NO SYMPOSIUM

• Benjamin H. Willier, President
• J. Walter Wilson, Secretary-Treasurer
• O.L. Sponsler
• George S. Avery, Jr.
• Harry S.N. Greene
• Kenneth V. Thimann

NO SYMPOSIUM

• Benjamin H. Willier, President
• J. Walter Wilson, Secretary-Treasurer
• O.L. Sponsler
• George S. Avery, Jr.
• Harry S. N. Greene
• Kenneth V. Thimann

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

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

SEVENTH SYMPOSIUM

• Ross G. Harrison, President
• George S. Avery, Jr., Secretary
• Francis O. Schmitt, Treasurer
• James W. Marvin
• Harry S.N. Greene

EIGHTH SYMPOSIUM

• Francis O. Schmitt, President
• Edward W. Shrigley, Secretary
• Lindsay M. Black, Treasurer
• James W. Marvin
• Ross G. Harrison

NINTH SYMPOSIUM

• Ralph H. Wetmore, President
• Edward W. Shrigley, Secretary
• Lindsay M. Black, Treasurer
• James W. Marvin
• Ross G. Harrison
• Viktor Hamburger