ILLUSTRATIONS 



Crystals of alkaloids obtained with potassium ferrocyanide and hydro- 

 chloric acid. The figures 1 : 50, etc., signify the dilutions at which the 

 respective crystals were produced. Magnification of microphoto- 

 graphs, X 50. 



Plate 1 



/3-eucaine, 1 : 50. 



Brucine, 1 : 400. 



Cinchonidine, 1 : 200. 



Cinchonine, 1 : 300. 



Cocaine, 1 : 300. 



Coniine, 1 : 25. 



Sparteine, 1 : 500. 

 Stovaine, 1 : 200. 

 Strychnine, 1 : 5,000. 



