PLATS XLVII. 



Figa. 299-303. 



Various forms of double gnow crystals, drawn by Mr. Glaisher. p 214. 



Fig. 305. 



Fig. 304. 





Dendritic crystals of muriate of ammonia, 

 p. 214. 



Crystals of creatine. p. 214. 



[To follow plate XLVI. 



