PLATE 5 



EXPLANATION OF FIGURES 

 KIDNEY. TARTARIC ACID 



10 Normul kitlnoy. 



17 Kidney jjoisonod with tartaric acid. Note the shrunken nuclei, broken 

 tubules, and debris. The very small black bodies in the cells of the excretoi'y 

 tubules are of eosinophilic hyaline substance. 



18 Normal excretory tubule. 



EFFECT OF TARTARIC ACID 



19 .Small excretory tubule showing granular degeneration with shrunken 

 opaque nuclei. 



20 Extreme stage of granular degeneration. The tubule is represented by a 

 nu'i(> mass of debris. Note the surrounding cells with large eosinophilic granules. 



21 Hyaline degeneration, showing hyaline droplets and shrunken nuclei. 



152 



