Complex sentence: Ellyson helped select the institution's longest-serving President, Frederic W. Boatwright in 1895, and served as the Board's president from 1908 until his own death in 1919.
Split into simpler sentences: Ellyson helped select the institution's longest-serving President, Frederic W. Boatwright, in 1895. He served as the Board's president from 1908 until his own death in 1919.