\UCCA ANGUSTIFOLIA. 281 



AQUEOUS MACERATIOX AT A TEMPERATURE OF 50° C. TO 60° C 



The BarJc of the Hoot (1), the Wood of the Boot (2). 



The powder (1) used in tlic cold water extraction was macerated with distilled 

 water heated between 50° and 60° C. The warm aqueous extract (1) was cooled and 

 mixed with three volumes of stronger alcohol. A precipitate formed, it was dried, 

 weighed, and the percentage estimated. It yielded 0.03 per cent.* The precipitate 

 was dissolved in warm water. On evaporating the filtrate, a >\hitr residue was oh- 

 tained. It was stained yellow by iodine. 



The i)owder (2) from the cold water treatment Avas macerated in the Avarm water. 

 The tcann aqueous extract (2) Avas a dark colored liquid, indicating a coloring matter. 

 A certam measure of the extract Avas evaporated, and the solids estimated. It 

 amounted to 4 per cent. The percentage of solids precipitated from the extract by 

 stronger alcohol A\'as 0.25 per cent. 



QUANTITATIVE ESTLAIATIOX OF SAPONlX-f 



The tAA'O methods of Christophsohn and Otten for the rpuuititatiA'c estimation of 

 saponin Avere adopted. The Avood of the root Avas examined. 



A. — Ten grams of the original poAvder Avere boiled Avith distilled Avatcr. The sapo- 

 nin was precipitated by baryta-water. After A\-eighing, it was ignited, and \\\v baryta 

 estimated as carbonate, calculated into oxide and deducted from the weight of the 

 saponin-baryta, the dilfcrence being llie Aveight of saponin. 



B. — The saponin-baryta Avas decomposed by a(i<l and the weight of the sapogenin 

 was ascertamed and calculated to saponm. 



Several estimations Avere made on tAvo specimens of the Yucca, collected at difter- 

 ent times of the year. 



Mean percentage, A 8.9o per cent. 



B 10.40t " 



SUMMARY IV. 



Aqueous Extracts. 



* Examination for Inulin, page 87, Plant Analysis, G. Dragendorff. English translation, 

 t Loc. cit., page 68. 



i Examination of the Tueca angutlifolia, by II. 0. Du S. Abbott. The Jleaitiil and Surgical Reporter, Sept. 

 12, 1885, p. 301. 



