An eminent chemist, born at Churchtown, Lancashire; has held successively the chairs of Chemistry in Owens College, in Bartholomew's Hospital, in the Royal Institution, in the Royal College of Chemistry, and in the Normal School of Science, South Kensington, the latter of which he resigned in 1885; has published various works, and was engaged with Lockyer in researches on the atmosphere of the sun; born 1825.