LIVING MATTER IN " PEOTOPLASM." 



27 



while, in the rest of the corpuscle, coarser groups of granules 

 arise, with either no mesh-spaces or else very narrow ones. The 

 groups at times are dissolved, and re-appear in different places, 

 and such alternations continue even when the temperature is 

 gradually lowered. 



In one colorless blood-corpuscle (temperature 23.5 deg. C., 

 73.6 deg. F.), a vacuole made its appearance, in which a torn 

 granule oscillated. I observed that the granule changed its 

 shape, and, at its periphery, delicate filaments appeared and 

 disappeared. On one occasion, three unusually long filaments 



were thrown out so as to reach 

 the wall of the vacuole, where- 

 upon the vacuole suddenly disap- 

 peared. Afterward, a new vacu- 

 ole, containing a granule, pre- 

 sented itself in nearly the same 

 place; but this vacuole became 

 dumb-bell shaped and enlarged 

 by the rupture of the wall of a 

 neighboring vacuole. Still later, 

 the whole blood-corpuscle was 

 transmuted into a vacuoled lump, 

 which continued to change its 

 shape, though very slowly. (See Fig. 3.) 



In some blood-corpuscles, small, vesicular nuclei, with dark 

 contours, and constantly one or two 

 nucleoli, often arose at an ascending 

 temperature below 30 deg. C. (86 deg. 

 F.). Such nuclei, on raising the tem- 

 perature, originated in different places 

 of the corpuscle, as I could directly 

 observe, from pale gray, compact 

 lumps, devoid of a dark contour. In 

 addition to the larger, distinctly bor- 

 dered nuclei, up to the number of four, 

 I also met with a varying number of 

 smaller nuclei. The nucleoli within a 

 dark-contoured nucleus possess deli- 

 cate radiating spokes, which go to the boundary layer of the nu- 

 cleus. The boundary layer, invariably surrounded by a light 

 rim, sends off numerous spokes, and these inosculate with a net- 

 work traversing the whole corpuscle. (See Fig. 4.) 



FIG. 3. DIAGRAM OF A VACUOLED 

 BLOOD-CORPUSCLE. 



FIG. 4. DIAGRAM OF A DEAD 

 BLOOD-CORPUSCLE. 



