Manual of Hygiene

as bacteriology and chemistry are concerned, but on the other hand he might well have devoted more space to the discussion of such important questions as the position of Gartner's bacillus in reference to Widal's reaction, or of the D2 bacillus in connection with epidemics of diphtheria. Many of the chapters might be fuller. The chapter on Air, for example, contains eighty-seven pages, and of these barely four are consigned to the important topic of vitiating dusts and vapours inseparable from many of our manufacturing industries. No mention, for instance, is made of the dyspepsia common among potters, or of the skin ulcers found in those engaged in the printing process known as " bronzing," &c. And more