Roscoe, Henry Enfield, his birth, 16; his education, 17; receives his first lessons in chemistry from William H. Balmain, 17; enters University College, London, 18; connection with Thomas Graham, 19; elects to follow chemistry as a career, 20; enters Birkbeck Laboratory, 21; his appreciation of Williamson, 21; becomes Williamson’s assistant, 21; is offered an assayership in the Sydney Mint, 22; takes his degree in the University of London, 22; goes to Bunsen at Heidelberg, 23; in Heidelberg, 25; his first published paper, 25; makes his doctor examination, 25; memorial lecture on Bunsen, 25-26; studies German University system, 26; returns to London, 27; is appointed to Owens College, 27; his work at Owens, 34; his part in shaping the curriculum of the new University, 38; is elected Chairman of Convocation, 90; as a teacher, 97; is offered lectureship at St. Bartholomew’s Hospital, 97; Chair at Oxford, 98; his method of working the Chemical Department at Owens, 98; his characteristics as a lecturer, 101; his portraits by Burgess and Herkomer, 103; address by students, 103; as an investigator, 110; gives his first Bakerian Lecture, 114; studies the absorption of hydrochloric acid and ammonia in water, 121; perchloric acid and its hydrates, 122; vanadium and its compounds, 123; gives his second Bakerian Lecture, 128; studies tungsten compounds, 130; discovers uranium pentachloride, 130; discovers columbium trichloride, 131; determines vapour densities of chlorides of lead and thallium, 131; disproves existence of “philippium,” 131; maps spark spectrum of terbium, 131; redetermines the atomic weight of carbon, 131; lectures on spectrum analysis, 132; papers on spectrum analysis, 134; Sicilian eclipse expedition, 134; wreck of H.M.S. _Psyche_, 135; “Lessons in Elementary Chemistry,” 138; “Chemistry Primer,” 139; “Treatise on Chemistry,” 139; “John Dalton and the Rise of Modern Chemistry,” 141; “New View of Dalton’s Atomic Theory,” 141; writes his life and experiences, 144; is elected into the Royal Society, 146; is awarded a Royal Medal, 146; joins Chemical Society, 146; is President, 146; “Society of Chemical Industry,” 147; receives medal of Society of Chemical Industry, 149; Honorary President of the International Congress of Applied Chemistry, 149; British Association, 150; British Association President, 151; member of Royal Commissions, 152; is knighted, 154; enters Parliament, 154; political services, 155; chemical adviser to Metropolitan Board of Works, 157; becomes Vice-Chancellor London University, 162; Fellow of Eton College, 165; member of Scottish Universities Commission, 167; of Royal Commission of 1851 Exhibition, 168;