TUCCA ANGUSTIFOLIA. 



273 



tion, gold chloride, ;uul potassio-mercuric solutions. Acetate of" lead caused no pre- 

 cipitation. Fehling's solution detected a trace of glucose. 



An imperfect emulsion formed on adding water to the alcoholic residue. Upon 

 standing, the resin settled ; the licpiid was filtered several times, and the greater part 

 of the resin collected. It was an opaque reddish-3-ellow-colored substance. It had 

 the same melting point (79° C), solubilities, and physical appearance as the resin of 

 ether extract (4). The resin was examined by llirschsohn's scheme. It differed in 

 character from the many resins described by that author, and it is proposed to name 

 it pyrophajal.* 



P^'rophical was slightly soluble in ether, and 9j per cent, alcohol ; soluble in ben- 

 zole, chloroform, and acetic ether ; incompletely soluble in cold absolute alcohol, 

 amyl alcohol, carbon di-sulphide, and oil of turpentine. It was saponified with aqueous 

 and alcoholic soda. The ethereal resin solution was cloudy. The alcoholic resin solu- 

 tion gave a precipitate with lead acetate which did not disappeai- on boiling; ferric 

 chloride and aqueous ammonia formed turbid mixtures with it. The chloroform resin 

 solution was not affected by bromine solution. The petroleum-ether-resin solution 

 turned to a turbid mixtuie on adding iodine solution. Alcohol containing hydro- 

 chloric acid was not colored by the resin. Sulphuric acid and alcohol gave a turbid 

 brown mixture with it, and sodium carbonate solution was colored pale brown when 



cold or on wai'minir. 



SUJIMARY III. 

 Alcoholic Extracts. 



^UiU extracted. 



1. The Imrk of the root 9.2.") p. ct. 0.20 p. ct. ash 



2. " wood " .... 



'A. " green leaf 



4. " yellow base of leaf. . 



14.:!0 



3.80 



! 4.30 



O.IO 

 0.15 

 0.05 



Character of 

 reiidue. 



I C red color- | 

 } ing mutter > 

 ( crystalline j 



resin, saponin 



.resins, " 



Iresin, " I 



Reaction wUh 

 litmus. 



neutral 



slightly acid 



iQunnlitaliie cili- 

 Quantitative c.ili.' '""""" "/lacclia. 

 mution o/gluciac. roseor other redu- 

 cible compounds. 



O.GlOp. Ct. 0.180 p. Ct. 



1..593 

 none 

 traces 



0.029 

 none 

 traces 



Extract (1). 



My attention was not directed to the presence of saponin in extract (1), for the 

 characteristic properties which it imparted to extracts (2), (8), and (4), were absent; 

 but, it was evident that saponin was ijrcsenl in the bark, for on boiling the latter in 

 distilled water, the presence of the compound was indicated. The .solution frothed on 

 shaking, and by adding a concentrated solution of caustic baryta, sapoiiin-baryta was 

 precipitated.f 



• Pyroplucal. Science, September 11, 188.5. 



\ Saponin in the bark of Yucca anguiU/olia. Science, September 11, 18H5. 



