146 PLANT AND ORGANIC CHEMISTRY 



remained constant, and the residue incinerated in a weighed 

 platinum dish and the ash estimated. 



I. 



TOTAL SOLIDS. 



Alcoholic residue dried at 100 C 9.25 per cent. 



" noC 9.25 " 



" ash 0.2 



The alcoholic residue was treated with distilled water, and 

 a definite volume of the extract was evaporated, dried, and 

 weighed. The alcoholic residue insoluble in water was treated 

 with water containing ammonia (one part in fifty). This 

 ammoniacal extract was evaporated with excess of acetic acid, 

 and the residue rinsed with a little water on a filter, dried, 

 and weighed. The dried aqueous extract insoluble in ammonia 

 was then estimated. 



II. 



Distilled water residue 3.22 per cent. 



Ammonia " " 5.43 " 



Insoluble " " ..0.60 " 



Total solids 9.25 



The aqueous extract from alcoholic residue was studied as 

 follows: It was not colored by a ferroso-ferric salt nor pre- 

 cipitated by gelatine and alum solutions, showing absence of 

 gallic acid and tannin. A portion of the aqueous extract was 

 acidified with sulphuric acid and agitated successively with 

 petroleum spirit, benzole, chloroform, and amyl alcohol. The 

 acidified liquid was rendered alkaline by ammonia and agitated 

 with the solvents in the same order. Petroleum spirit removed 

 from the acidified solution traces of an amorphous residue, 

 soluble in sulphuric acid and caustic soda. Benzole and chloro- 

 form separated no substances from the solution. As the amyl 

 alcohol solution was evaporating, white needle-shaped crys- 

 tals were seen floating in the liquid. On drying the residue 



