A CHEMICAL STUDY OF YUCCA ANGUSTIFOLIA. 



255 



between 100° C. and 110° C. until the weight remained constant, for the estimation of 

 moisture. This powder was incinerated in a covered i)orcclain crucil)le at a dull red 

 heat until the carbon was entirely consumed. The per cent, of total ash was deter- 

 mined from it. 



QUALITATIVE ASH ANALYSES. 



Calcium, magnesium, potassium, sodium, iron, manganese, chlorides, phosphates, 

 and sulphates, were found in every part of the plant. 



C I. MOISTURE ) 



Determination of i . , ^ on the powder. 



in. TOTAL ASH j ^ 



I'ETKOLEUM SPIUIT EXTRACTS. 



Extract (1) Bark of Boot. 



The maceration was conducted in an apparatus similar to one described in Drag- 

 endorff's " Plant Analysis."^' A light petroleum spirit was used which boiled between 

 25° C. and 45° C. The extract was filtered from the jwwder-residuc. It was a clear 

 pale yellow-colored liquid, and slightly acid in reaction. A drop of the extract on 

 evaporating left a uniform spot on blue paper. The extract was evaporated at the 

 oidinary temperature. The residue was a solid, and it had the odor and characteristic 

 cry.stalline structure of fatty acid.s, suggesting the presence of a fixed oil. Its melt- 

 ing point was taken. 'I'hc substance melted at 00° C, and on cooling solidified amor- 

 phous. To determine the total amount of solids extracted, a definite volume of the 

 extract was evaporated, dried, and weighed. 



TOTAL SOLIDS. 



Petroleum gpirii residue (ir\c(\ at lOOO C 1.24 per cent of solids, 



" UOOC 1.20 " " " 



0.04 



loHS. 



The residue was identified as a fixed oil. It was soluljle in jjctrolcum spirit, 

 ether, benzole, chloroform, ainyl alcohol, carbon di-sulphide, and cold arpieous alka- 

 lies; incompletely .soluble in cold or boiling 8G per cent, alcohol, 1*5 pcM- cent, alcohol, 

 absolute alcohol, acetic ether, and aminoniura hydrate. No change of color was 



* Page 90, Tollen's apparatus. 



