STUDY OF YUCCA ANGUSTIFOLIA 163 
Several estimations were made on two specimens of the 
Yucca, collected at different times of the year. 
Mean percentage, A.8.95 per cent. 
“ “ B. 10.40 1 “ 
SUMMARY IV. AQUEOUS EXTRACTS 
Solids ex¬ 
tracted. 
Ash. 
Gum. 
Ash. 
Glucose • 
Saponin. 
1. Bark of the root.... 
2. Wood of the root... 
4.00% 
12.10% 
4*35 Jo 
2.65% 
i- 74 % 
°' 4 ° 
2.00% 
1.70% 
0.77 Jo 
6 o' c 
traces 
4 - 47 % 
traces 
A. 
8 - 95 % 
B. 
10.40 % 
4. Yellow base of the 
leaf. 
/V 
n- 35 % 
3-io% 
3.85 % 
0.67% 
traces 
The aqueous extracts contained gum, albuminous substances, 
carbhydrates, glucose, saponin, organic acids, calcium ox¬ 
alate, and no tannin, mineral acids, nor alkaloids. Arabin 
was not separated from gum (1). Calcium oxalate was brought 
into aqueous solution possibly by means of the organic acids 
or saponin. Needle-shaped crystals were found in extract (3). 
They did not respond to tests for formates, acetates, ma- 
lates, citrates, tartrates, phosphates, oxalates, glucosides, and 
alkaloids. 
Aqueous extracts of 50° C. to 6o° C. from the bark and wood 
of the root contained Inulin. 
DILUTE CAUSTIC SODA EXTRACTS 
Extract (1), the Bark 0} the Root. 
The residual powder insoluble in water was suspended 
whilst moist in a dilute soda solution (0.1 to 0.2 per cent). 
After twenty-four hours the mixture was filtered. One volume 
of the filtrate was acidified with acetic acid and mixed with 
three volumes of 90 per cent, alcohol, and allowed to stand 
in the cool. The precipitate was collected, washed with 75 per 
1 “Examination of the Yucca angustijolia” by H. C. De S. Abbott, The 
Medical and Surgical Reporter , September 12, 1885, p. 301. 
