Having been written expressly as a manual for the examinations of the Science and Art Department, and following the sylIabus of the elementary and advanced stages, those subjects, as Vital Statistics, Sewage Disposal, Unhealthy Trades, and Sanitary Law, which are comprised in the honour stage only, had to be omitted, or, with wholly inadequate discussion, relegated to an appendix while, on the other hand, the requirements of South Kensington necessitated the inclusion of a chapter on the immediate treatment of accidents, wounds, fits, which has been omitted from this edition as irrelevant. As in the previous editions, I have throughout laid great stress on the principles involved and the laws implied in each branch of the subject, of which the practical applications are in constant change and progress towards, though never attaining, finality and I have in like manner avoided giving special prominence to the productions or procedures of particular makers or patentees, unless they present striking illustrations of important principles or unusual ingenuity and excellence of construction. In the chapter on Dietetics.....