BARK OF FOUQUIERIA SPLENDENS 121 
found to fuse between 43 0 C. and 6o° C., the greatest change 
occurring between 57 0 C. and 6o° C.; to be soluble in chloro¬ 
form and ether; scarcely soluble in cold absolute alcohol; 
very slightly soluble in boiling 95 % alcohol; not acted upon 
by nitric acid or aqua regia. Sulphuric acid dissolved the 
substance and gave an orange color reaction discolored on add¬ 
ing alcohol, ether, chloroform, and ammonia to the acid liquid, 
with no precipitate; with amyl alcohol a pale rose pink, quickly 
fading, and with benzole a brown color were obtained. The 
color tests differed from those obtained with the substance 
before saponification and treating with boiling ether, indi¬ 
cating that the petroleum spirit residue can be separated into 
at least two substances, and possibly more, which remain to 
be determined by a future study. 
The powder exhausted by petroleum spirit was dried and 
similarly treated with absolute ether, as in the previous ex¬ 
traction. The ethereal extract of a greenish color gave an acid 
reaction with litmus, and on addition of alcohol the liquid 
became turbid. Spectroscopic examination failed to detect 
the characteristic chlorophyll bands. The ethereal residue 
on evaporation presented differences in color and solidity 
from the petroleum spirit residue. It was quite brittle, and 
was not appreciably softened at 120° C. It gave, when dried 
at ioo° C. 4.52 % of solids extracted; at iio°C. 4.44 %; and 
at 120 0 C. 4.42 %. The residue when evaporated at ordinary 
temperature was insoluble in petroleum spirit, slightly solu¬ 
ble in 95 % alcohol and carbon di-sulphide, quite soluble in 
cold absolute alcohol, amyl alcohol, chloroform, benzole, and 
oil of turpentine. Nitric acid gave no reaction. With sul¬ 
phuric acid and small portions of the ethereal residue, I 
obtained a dark mahogany color. This solution on adding 
absolute alcohol was partially discolored, no precipitate. With 
ether the sulphuric acid solution gave a greenish precipitate; 
with amyl alcohol the acid solution was discolored, changing 
to pale red, then green. These tests showing in each case a 
wide difference in color reactions from those obtained with 
the petroleum spirit residue. The amount of solids taken up 
on treating the ethereal residue with water was .36 %. The 
