68 



ANIMAL PHYSIOLOGY. 



[LESSON 23. 



FIG. 98. 



cleus consists wholly of Fibrine; the blood of a 

 frog was placed upon a slip of glass, and slightly 

 diluted with water ; in due time the cell membrane 

 dissolved, and liberated the nuclei. These main- 

 tained their integrity for a time, but in the end be- 

 gan, insensibly, to dissolve. They firstly became 

 completely spherical, and shortly afterwards, the 

 sphere simultaneously diminishing, and the water 

 evaporating, a number of radii suddenly shot out 

 from all that remained of the nuclei, and this process continued un- 

 til the water had completely evaporated. The dried preparation be- 

 ing examined, disclosed fibrillation of fibrine emanating from the 

 nuclei respectively; but the water being insufficient to complete 

 their entire resolution, portions of the majority of the nuclei re- 

 mained, and are still permanent (Fig. 99). This experiment was re- 



Corpuscles of Blood, 

 Frog. 



FIG. 99. 



FIG. 100. 



Fibrillation of Fibrine, Blood of Frog. 



Fibrillated Blood of Locust 



FIG. 101. 



peated several times, with the like uniform results, and six prepara- 

 tions exist to confirm these facts. In every instance the cell-wall ap- 

 peared to dissolve entirely, and exhibited no tendency to fibrillate ; 

 moreover, the fibres of fibrine are, in every instance, distinctly seen 

 emanating from all that remains of the nuclei 



390. The same experiment was made on the blood of a locust, 

 with precisely the like results (Fig. 

 100). Here some of the blood cor- 

 puscles are (comparatively) large (a) y 

 while others are minute (b) ; fat or oil 

 globules are also seen at c. So great 

 is the disposition for blood to fibrillate 

 when drawn from the body, that the 



Blood Fibrillating Frog. nuclei of ^ fr()g , g ^^ yery ^ 



quently throws out fibres of fibrine, within the cell-wall, as illustrated 



