BARK OF FOUQUIERIA SPLENDENS 121 



found to fuse between 43 C. and 60 C., the greatest change 

 occurring between 57 C. and 60 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 1 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 100 C. 4.52 % of solids extracted ; at noC. 4.44 %; and 

 at 120 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 



