THIS is an admirable collection of problems covering a wide range, and including many of an advanced character. A pleasing feature is the brief but lucid account of chemical theory, including a short section on atomic numbers. The book should prove of great service to teachers and to students preparing for degree examinations. It is distinctly better than most books on chemical arithmetic, since it aims at a higher standard.
Chemical Theory and Calculations: An Elementary Text-Book.
By. Second edition. Pp. vii + 144. (London: Constable and Co., Ltd., 1920.) Price 4s. 6d. net.