PLATE XXVI. 



FIG. 192. 



FIG. 193. 



ff// 



Tube-casts. 



Nitrate of Urea. 



FIG. 194. 



FIG. 195. 



Urate of Ammonia. 



FIG. 196. 



Uric Acid. 







Uric Acid. 



FIG. 197. 



o 



f-7 , 



Uric Acid re-precipitated. 





