the pus obtained at operation. The other cases had already been operated upon and no analysis of the pus was made. Such results seem suggestive to say the least, and they should be followed up. Another curious feature about the agglutination of the typhoid bacillus has just been brought out by the experiments of Malvoz (Annales de l'Institut Pas¬ teur, Tome XL, No. 7, 1897), who has succeeded in producing a reaction with typhoid bacilli, similar to that produced by typhoid serum, by various

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... ic substances. He mentions especially formaldehyde, corrosive sublimate, peroxid of hydrogen, and strong alcohol. Among the anilin colors, crysoidin, vesuvin, and safranin have the property of provoking a perfect agglutination even in very dilute solutions. Malvoz attempts to use this agglutinative action of chemicals for the differentiation of colon and typhoid bacilli, and appears to find a considerable difference in the behavior of these two types. On this point, however,