i 4 6 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 ioo° C.9.25 per cent. 
“ “ “ iio° C.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 
