Since the discovery of this test for detecting the presence of typhoid fever, several years ago, all sorts of statements enthusiastically praising or severely condemning the reaction have appeared. On the whole, medical opinion, particularly in this country, has been very favorable. Nevertheless, we have been waiting with considerable impatience for a large statistic report from some recognized authority, that would decide the question with a reasonable degree of certainty. Such a report has just been published by Cabot (vide Journal April 1, p. 731), than whom no one is more competent. He has apparently exhausted the literature on the subject and his tables have been compiled from the writings of over a hundred observers. These observers represent all parts of Europe and America, and illustrate the three methods of testing, as well as numerous varieties in technic, for almost every observer has some variations which he believes, or pretends