FIG. 50. 



Liesegang's rings. 

 R. Liesegang.) 



(From 



FIG. 51. Laminated urinary calculus 

 (urates). (Drawing by H. Schadde; 

 from von Frisch and E. Zuckerkandl.) 



FIG. 53. Oil-droplets super-saturated with cho- 

 lesterin. Crystalline separation of cholesterin 

 may be recognized in several droplets. 



FIG. 52. Primitive gall-stone 

 pattern. (Myelin clump.) 

 Magnified X 62. 



FIG. 54. Laminated 

 calcium bilirubin 

 stone. 



PLATE II. 



