1 882.] A Pathogenic Schizophyte of the Hog. 301 



through their walls into the tissues, or if the pressure is a great 

 one some of the capillaries will yield, and become dilated or 

 break behind the obstruction, and thus small specks of blood 

 are extravasated. These extravasations are sometimes, especially 

 in younger animals, exceedingly numerous, and present them- 

 selves as tiny red, or reddish-brown specks of the size of a pin's 

 head, or smaller. To mention the further, or subsequent changes 

 which are taking place, will not be necessary, for the same have 

 but little bearing upon the subject. The question is what ob- 

 structs the capillaries? It, of course, must be something solid or 

 corporeal, and I have not been able to find anything, except the 

 swine-plague Schizophytes. It is true, the single and double 

 micrococci, and the micrococcus-chains cannot and do not do it, 

 for they are abundantly small to pass everywhere with the greatest 

 facility where a blood corpuscle can pass, but these micrococci 

 form zooglcea-masses or coccoglia, which frequently are many 

 times the size of a blood corpuscle, and therefore sufficiently 

 large to clog the finer capillaries. Besides, some of the micro- 

 cocci enter, or are taken up by the white blood corpuscles, and swell 

 the latter not seldom to an abnormal size, or a size large enough 

 to obstruct some of the finest capillary vessels. In all my ex- 

 aminations of diseased lung-tissue, and lung-exudation, these 

 zooglcea-masses and white blood corpuscles invaded by micro.- 

 cocci, have never been found miss ented them- 



selves in great, though somewhat variable numbers. No matter, 

 in which way, or by what means the Schizophytes enter the ani- 

 mal organism, and get into the blood by being absorbed by the veins 

 or by the lymphatics, the first capillary system to which they 

 come, is in the lungs, which may account for the fact that in 

 swine-plague morbid changes in the lungs, consisting in exuda- 

 tion, extravasation of blood, and finally hepatization are never 

 absent. At least I found them at every post-mortem examination, 

 and in the last three years I made about 300. Dr. James Law, 

 of Ithaca, N. Y., in his report to the Commissioners of Agricul- 

 ture, records the lungs of some of his experimental pigs as 

 "healthy," "sound," "normal," etc., which simply shows that 

 those pigs were not affected with swine-plague, and did not die of 

 that disease. It may here also be mentioned that in all cases of 

 swine-plague most of the lymphatic glands are more or less en- 

 larged, and that comparatively more Schizophytes can be found 



