At this stage his interests were in mathematics, physics and astronomy and after graduating with an A.B. in 1884 he spent a year as an assistant in the physics laboratory at the Wesleyan University.
Sa hakbang na ito sa kanyang mga interes ay sa matematika, physics at astronomy, at pagkatapos graduating na may AB in 1884 siya na nagastos sa isang taon bilang isang assistant sa physics laboratoryo sa Wesleyan University.