284 



A CHElvnCAL STUDY OF YUCCA ANGUSTIFOLIA. 



Extract (3), (he Qreen Part of Leaf. 



The powder used in the dilute soda maceration was Avashed with distilled water 

 and suspended in water containing 1 per cent, of hydrochloric acid. Iron and calcium 

 phosphate wei"e detected in the extract. The leaves were examined under the micro- 

 scope, and a blue color was developed by an aqueous solution of iodine, indicative of 

 starch granules. Starch was also present in the yellow base of the leaves. 



TOT.Vr, QUANTITATIVE RESULTS. 



In my paper on The Chemical Study of Yucca angustfolia, read at Ann Arbor, 

 Mich., I stated what methods I had employed to separate sa])onin, and the properties 

 of the compound as observed in that plant. Since which 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 indel)ted to Dr. F. M. Endlich, for his courteous consideration and kind- 

 ness 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, jN^ew Mexico. 

 "Within a few weeks I have received, in addition, several hundi-ed pounds of the plant 

 from Dr. Endlich.. 



The investigations described in the preceding pages Avere conducted in the 

 chemical laboratory of the Philadelphia College of Pharmacy, from February to 

 August, 1885. 



