benjamin osgood peirce (11 february 1854 beverly, massachusetts, usa – 14 january 1914 cambridge, massachusetts, usa) was an american mathematician and a holder of the hollis chair of mathematics and natural philosophy at harvard from 1888 until his death in 1914. osgood is buried at beverly's central cemetery. removed by several degrees, he was a cousin of charles sanders peirce, whose father, benjamin peirce, worked as the adcademic advisor to joseph lovering, benjamin osgood peirce's predecessor as holder of the hollis chair of mathematics and natural philosophy.