202 A Pathogenic Schizophyte of the Hog. [March, 



inal contraction between the secondary cells also gradually in- 

 creases and becomes deeper, till it finally appears like a separa- 

 tion, and then the end walls of both cells appear to be closed; 

 the connecting neck cannot be seen, and the cells, now two bi- 

 spherical micrococci, seem to merely touch each other. The 

 single micrococci, too, become double or bispherical, and those 

 already double gradually increase to chains of various length, 

 and not dissimilar in appearance to a chain of an old-fashioned 

 watch. These micrococcus-chains I consider as the third form 

 spoken of. The same, however, hold together only temporarily, 

 or for a short time, and then break up into larger or smaller 

 joints, each joint consisting of one or more bispherical micro- 

 cocci. When these chains separate or break up, the separation 

 is not a sudden nor a rapid one ; on the contrary, the bispherical 

 micrococci which are about to separate appear to become at first 

 more loosely connected with the rest of the chain ; do not seem 

 to be in as close a contact with the adjoining portion as before ; 

 a small space between them becomes visible ; still there is evi- 

 dently yet a connection, because the movement of the separating 

 joints, although apparently independent, are limited to a swinging 

 to and fro. The space, however, gradually widens, till finally a sep- 

 aration takes place, and each link or joint goes its way. If the 

 light is very good and well adjusted, and the human eye in first- 

 rate condition, an objective like my Tolles' T V or Zeiss' T V will reveal 

 the existence of an exceedingly slender thread, a flagellum, which, 

 gradually lengthening and finally snapping apart, constituted the 

 connecting link or medium between the separating joints. I have 

 repeatedly seen it as a post-flagellum when the joint or bispheri- 

 cal micrococcus was slowly moving, but so far have never seen 

 one at both ends. It may here be remarked, I have n^ver seen 

 any single micrococci separating from such a chain or its joints, 

 consequently the single or spherical micrococci must have an- 

 other source or origin ; but there is little hope that the latter will 

 ever be fully revealed, unless our makers of objectives — men like 

 Tolles, Zeiss, Powell and Leland, and others — will succeed in 

 producing objectives which will give as good and sharp defini- 

 tions, with an amplification of 2500 or 3000 diameters, as their 

 best ones now in existence are giving with 1200 or 1500 diam- 

 eters. Still, there is a multitude of other much larger Schizo- 

 phytes, and concerning them our present means are about suffi- 



