Complex sentence: From 1895 to 1898 Jepson served as instructor, and carried on research at Berkeley, Cornell (1895) and Harvard (1896-97), and received his Ph.D. degree at University of California, Berkeley in 1899.
Split into simpler sentences: From 1895 to 1898 Jepson served as instructor, and carried on research at UC Berkeley, Cornell (1895) and Harvard (1896-97). He received his Ph.D. degree at University of California, Berkeley in 1899.