3949594 Professor Henry A. Rowland, 1897 (oil on canvas) by Eakins, Thomas Cowperthwait (1844-1916); 203.8x137.2 cm; Addison Gallery of American Art, Phillips Academy, Andover, MA, USA; (add.info.: Professor Henry Augustus Rowland (1848??901) was an American physicist, who served as the first president of the American Physical Society from 1899-1901, best remembered for his work with diffraction gratings and the solar spectrum.); byAddison Gallery of American Art ; gift of Stephen C. Clark, Esq..