Mr. Lunt transferred his services to the British Institute of Preventive Medicine, but Roscoe continued to carry on his laboratory with the assistance of Mr. Frank Scudder until 1898. During this period he acted as chemical adviser to sanitary authorities all over the country on questions of sewage purification and water-supply; and was frequently consulted by manufacturers on works-processes, and on legal, patent, and trade-mark cases, and in connection with parliamentary inquiries, e.g. humidity and purity of air in textile mills, flashpoint of paraffin oils, etc. He was further concerned in the promotion of Bills for the creation of rivers boards, as, for example, those of the Mersey and Irwell and West Riding. He gave considerable attention to the question of the manufacture and use of water gas (“carburetted” and “blue” gas), and inspected most of the water-gas plants then in operation in England and on the Continent, sending Mr. Scudder to visit and report on the installations in the principal cities of America. In 1898 they both gave evidence before a Parliamentary Committee on the question of restricting the amount of the poisonous carbonic oxide in town gas. In 1891 Roscoe’s services were retained by the Mersey and Irwell Joint Committee to report on the influence of the various manufacturing works in the Mersey and Irwell basins in polluting the streams, and as to the best means of preventing it. In 1893 the Committee made the position of Scientific Adviser a permanent appointment, and established a properly equipped laboratory in Manchester in connection with its work. Roscoe retained the appointment until 1905, when the frequent journeys to attend the meetings of the Joint Committee began to tell upon his health, and at his suggestion Mr. Scudder was appointed to succeed him. The London laboratory was given up in 1908. CHAPTER XI UNIVERSITY OF LONDON—ETON COLLEGE—UNIVERSITY COLLEGE OF DUNDEE—SCOTTISH UNIVERSITIES COMMISSION—ROYAL COMMISSION OF THE 1851 EXHIBITION—CARNEGIE TRUST: SCOTTISH UNIVERSITIES—SCIENCE AND ART DEPARTMENT: SCIENCE MUSEUMS—LISTER INSTITUTE OF PREVENTIVE MEDICINE Roscoe was long and honourably connected with the University of London. A graduate in 1853, he acted as examiner in chemistry from 1874 to 1878. It was largely through his action that practical laboratory work was included in the curriculum in chemistry for science degrees. This not only greatly enhanced their status, but reacted beneficially upon the general character of laboratory instruction throughout the country. On relinquishing parliamentary work he became a member of the Senate, and took part in the movement for the reform of the University which led incidentally to the formation of an association of teachers and others for the promotion of a so-called Professorial University, of which Huxley was President. The following letter refers to this circumstance: