Boltzmann and Ostwald at St. Louis Congress
Hardaker, Palmer, and Seitter Converse
Keith Seitter (left) conversing with some exhibitors
Ford at Woods Hole
International Conference on Physics 1934
International Mathematics Congress 1932
International Congress on Theoretical Physics 1965
ION Fall Meeting 1945
ION Eastern Regional Meeting 1949
ION Annual Meeting Luncheon 1951
ION National Meeting Dinner 1951
Fifth IAU General Assembly
Fourth IAU General Assembly
Souvenir silk handkerchief depicting the mounting for the 40 inch Yerkes Observatory refracting telescope
Society of Rheology Annual Meeting
Fourth Solvay Conference on Physics
First meeting of the Society for Natural Philosophy
OSA Meeting Banquet 1952


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