Public Health Laboratory Work

bacteriological examination of air and water, &c., might have had more space devoted to it, considering the iiirmnse importance of modern developments in this particular branch of study. We are glad to report that this blemish has been removed, and that uu ier the hands of Dr. W. G. Savage this section has developed from the twenty pages of the second edition into nearly 140 piges of this edition. It now treats of the bacteriological examination of water, air, soil, food anl food products; determination of antiseptic and germicidal power; tuberculous, diphtheria, typhoid fever, cholera, plague, anthrax, anaerobes, and an useful appendix for the preparation of media, stains, sections and other matters of practical laboratory importance. The rest of the work has also undergone most thorough revision. Though a good deal of new matter has been added, and the descriptions of various processes have been substituted by others, yet Mr. Kenwood is to be congratulated o > having been able to limit his material to much the same amount of space as in the former edition-. It is a matter of comfort and convenience to have a laboratory book of a handy size such as this one. An unwieldy book gives trouble, and wastes time and energy. The demand for a third edition is evidence of the appreciation of those who