YUCCA ANGUSTIFOLIA. 283 



■weighed, and ignited, the resulting oxide of copijer being deducted. It yielded 0,101 per 

 cent, of albuniinoid.s. A current of Avashcd cai'bonic acid was passed through the 

 dilute soda extract to determine the presence of globulin (vitcllin. myosin), and with 

 negative results. The albuminoids were determined from the total nitrogen in the 

 powdered wood. It amounted to 4,75 per cent. The total albuminoids in the leaves 

 gave 9,02 per cent, 



DILUTE IIYDKOCIILORIC ACID KXTRACTS. 



Extract (1), the BarJc of the Hoot. 

 The i)owder insoluble in ililute so<1a was washed with water and suspended in 

 water containing 1 per cent, of hydrochloric acid. The absence of the blue color which 

 the stai-ch granules assume when treated with iodine solution was determined by exam- 

 ining the bark under the microscope ; and consequently it was not looked for in the 

 extract. A qualitative test showed the presence of calcium phosphate, and calcium 

 oxalate, A measured quantity of iXw filtrate was neutralized with ammonia and mixed 

 with three volumes of 90 per cent, alcohol. The precipitate was collected on a weighed 

 filtei-, washed with GO per cent, alcohol, dried, and weighed. It was incinerated, and the 

 ash deducted from the precipitate. 



The precipitate yielded rj.CO per cent. 



ofash 0.98 



Organic substance 4.23 " 



The filtrate from the 90 per cent, alcohol precipitate was evaporated. The residue 

 was composed of ammonium chloride, from the reagents employed, and an organic sub- 

 stance having an odor like gum benzoin. It was agitated with ether and on evapo- 

 rating the solvent a white residue with an odor like benzoin was obtained. Sulphuric 

 acid gave a red color with it. The amount of this substance was calculated. It 

 gave 0.4.J per cent. 



Extract (2), the Wood of the Boot. 



The insoluble powder rrom llie diliile .soda maceration was washed with distilled 

 water, and suspended in water containing 1 per cent, of hydrochloric aci'l. The same 

 means were used as in extract (1) to determine the absence of starch in the wood of the 

 root. Parabin was also absent. Calcium oxalate was detected by qualitative tests. 

 A similar method, as employed for its estimation in extract (1), was used to determine 

 it quantitatively. 



The precipitate yielded 0,"0") per cent. 



" " ofash 0.1.5.') " 



Organic substance 0. loO " 



A. P. S.— VOL. XVI, 2 J. 



