(v.) Analytical Chemistry (Vol. 6, p. 60), with which may be consulted, Blow Pipe (Vol. 4, p. 89), Distillation (Vol. 8, p. 318), Electrolysis (Vol. 9, p. 217), Indicator (Vol. 14, p. 482), Solution (Vol. 25, p. 368), Stoichiometry (Vol. 25, p. 939).

(vi.) Physical Chemistry (Vol. 6, p. 65) supplemented by Energetics (Vol. 9, p. 390), Chemical Action (Vol. 6, p. 26), Thermochemistry (Vol. 26, p. 804), Solution (Vol. 25, p. 368), Distillation (Vol. 8, p. 318), Condensation of Gases (Vol. 6, p. 844), with the important articles Photochemistry (Vol. 21, p. 484), Electrochemistry (Vol. 9, p. 208), Metallurgy (Vol. 18, p. 203), Electrometallurgy (Vol. 9, p. 232), Assaying (Vol. 2, p. 776).

Among the contributors to the chemical department of the Britannica are: Professor Ernest Rutherford, of the University of Manchester; Walter Nernst, professor of physical chemistry in the University of Berlin; W. C. D. Whetham, author of Theory of Solution, etc.; Prof. James Walker of the University of Edinburgh; Johannes Diderik van der Waals, professor of physics, University of Amsterdam; W. R. E. Hodgkinson, professor of chemistry and physics, Ordnance College, Woolwich, perhaps the greatest living authority on explosives.

The following is a classified list of the articles on Chemistry which are contained in the Britannica. For discussions of the application of chemistry to photography, the reader should consult the article Photography (Vol. 21, p. 485), of which the chemical section is by Sir W. de W. Abney, adviser in Science to the English Board of Education.

CHEMISTRY—GENERAL

INORGANIC CHEMISTRY

ORGANIC CHEMISTRY