STUDY OF YUCCA ANGUSTIFOLIA 167 
In my paper on “The Chemical Study of Yucca angusti- 
jolia ,” read at Ann Arbor, Mich., I stated what methods I had 
employed to separate saponin, and the properties of the com¬ 
pound as observed in that plant. Since that time a further 
study of it has induced me to withhold the notes used at Ann 
Arbor, from this, and to offer them, with those collected later, 
in a separate and more complete publication. 
I am indebted to Dr. F. M. Endlich for his courteous con¬ 
sideration and kindness in selecting and forwarding the fine 
specimens of Yucca which were used in these analyses, and 
which were grown in the neighborhood of Lake Valley, New 
Mexico. Within a few weeks I have received, in addition, sev¬ 
eral hundred pounds of the plant from Dr. Endlich. 
The investigations described in the preceding pages were 
conducted in the chemical laboratory of the Philadelphia 
College of Pharmacy, from February to August, 1885. 
