BACILLUS AEROGENES CAPSULATUS. 471 At times, however, as in a case of Graham Stewart and Baldwin, there is no' doubt that the bacillus produces gas in the tissues of the entire body during life. These observers, in a case of abortion with subsequent infection, found the patient u emphysematous from the top of her head to the soles of her feetn several hours before death. In this case, in which the bacillus was found in pure culture, it would indeed be difficult to doubt that the fatal issue was due to the bacillus aerogenes capsulatus. Whether the fatal termination of the cases is due to the presence of gas in the vessels, or partly to that and partly to some toxic property it possesses, does not seem to have been worked out as yet. It would seem, however, to have a toxic property from the fact that the onset of the infec- tion is first shown by the occurrence of chill, pyrexia, and rapid pulse, and from the change caused by the clumps of bacilli upon the surrounding cells of the tis- sues in which they occur.