Complex sentence: M.R.C.P., etc. (1847-1920), a medical electrician at St. Thomas Hospital, London, where, from 1879 to 1893, he was in charge of electrotherapy.
Split into simpler sentences: M.R.C.P., etc. (1847-1920) was a medical electrician at St. Thomas Hospital, London. There, from 1879 to 1893, he was in charge of electrotherapy.