176 



THE MICROSCOPIST. 



The crystalline forms of uric acid are various, but appear to 

 be modifications of the rhombic prism. 



Fig. 54. 



Fig. 55 represents some of its forms. 



Oxalate of Lime often exists in the form of minute octahe- 

 dral crystals, varying from ? Joth to .gg^th of an inch in 

 diameter, a, Fig. 56. When allowed to dry on the glass, each 



