EXPLANATION OF PLATES. 



Ail the figures are magnified 525 diam. with the exception of fig. 2. 



FIG. 1. Liver cells after a fast of 24 hours. The nuclei are clear whilst the 

 cytoplasm containes abundance of zymogen and in the neighbourhood of the bile 

 capillaries many refractile granules. 



FIG. 2. Portai tracts showing the small cells at the periphery of the lobule. 

 X 70. 



FIG. 3. A part of the same more highly magnified. The density of the cyto- 

 plasm of the small cells as compared with that of the others is well brought out. 



FIG. 4. 2 hours after feeding on lean beef. The nuclei show a certain amount 

 of clouding. 



FIG. 5. 5 hours after feeding on lean beef. The liver cells show considérable 

 vacuolation. 



FIG. 6. 8 hours after feeding on lean beef. The nuclei are very clouded. 

 Zymogen arranged in large masses is présent in the cells 



FIG. 7. 1 hour after feeding on starch paste. The nuclei show considérable 

 clouding. The précipitation of the cytoplasm in the form of spherules is well 

 brought out. 



FIG. 8. 3 hours after feeding on starch paste. The nuclei are beginning to 

 become clear and the cytoplasm is filled with masses of zymogen. 



FIG. 9. 6 hours after feeding on starch paste. The nuclei are becoming clouded 

 for the second time. The cytoplasm contains many large spherules. Hère and there 

 a trace of zymogen can also be seen 



