He was brother to George Dupont Pratt, Herbert L. Pratt, John Teele Pratt and Harold I. Pratt; and half-brother to Charles Millard Pratt.
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In 1893, he was elected President of the Board of Pratt Institute, taking over from his elder brother, Charles Millard Pratt. He remained in this post for 44 years, when the title passed to his son Charles.
In 1910, he succeeded Caspar Whitney as president of the American Olympic Committee, now the United States Olympic Committee, but only served for five weeks, prior to Col Robert Means Thompson.
[edit] Personal life