Education
He graduated from Columbia University, where he was tutor in mathematics in 1859–1860.
He graduated from Columbia University, where he was tutor in mathematics in 1859–1860.
From 1863 to 1866 he served as United States consular agent at Bradford, England. He served as president of the American Mathematical Society in 1890–1894 and of the Actuarial Society of America in 1895–1897. He was born to John and Caroline Augusta Wakeman McClintock.
His father was also involved in an 1847 a riot over slavery, as he tried to prevent slavechasers from taking African-American citizens of Pennsylvania into slavery.
He was actuary of the Asbury Life Insurance Company, New York (1867–1871), of the Northwestern Mutual Life Insurance Company, Milwaukee, Wisconsin, (1871–1889), and of the Mutual Life Insurance Company, New York (1889–1911). Of the Mutual he was vice president in 1905–1911, trustee after 1905, and consulting actuary after 1911.