Complex sentence: In the winter of 1872-73, after emigrating to Boston, Bell became a professor of elocution at Boston University, continued research into phonetics, and resumed the electrical experiments he had begun in Bath and London towards improving the telegraph.
Split into simpler sentences: In the winter of 1872-73, after emigrating to Boston, Bell became a professor of elocution at Boston University. He continued research into phonetics and resumed the electrical experiments he had begun in Bath and London towards improving the telegraph.