He taught at Harvard University for almost 50 years .
James Mills Peirce ( May 1 , 1834 -- March 21 , 1906 ) was an American mathematician and educator .
James Mills Peirce taught at Harvard University for almost 50 years .
James Mills Peirce ( May 1 , 1834 -- March 21 , 1906 ) was an American mathematician and educator .