The study of disinfectants and disinfection is of interest to all who are concerned in the preservation of public health. Recent years have afforded the means of placing this study upon more of a reliable and scientific basis. Frequent observation has noted the fact that although a certain disinfectant may be possessed of active germicidal properties in the laboratory, where it can generally be brought in direct contact with the microbe, it often fails signally when applied on a larger scale or for practical purposes.
Recently formaldehyde has been brought forward with considerable enthusiasm as a disinfecting agent, and the series of experiments embodied in this paper were directed toward determining to a certain extent its utility in this respect. In connection with a cursory review of the existing literature on the subject, an effort has been made to draw into comparison the several agents and substances heretofore used more