B IGNONIA EjE. 1 9 



examination^ proved to be largely composed of the yellow 

 crystalline body oroxylin. The cold proof spirit solution of the 

 alcoholic residue was evaporated to dryness and the extract 

 treated with water and filtered. The filtrate was treated 

 successively with neutral and basic acetate of Icad^ and the 

 precipitates after washing were su.spended in water, decom- 

 posed by a current of sulphuretted hydrogen and the resultant 

 plumbic sulphide removed by filtration. Sulphuretted hydrogen 

 was also passed through the filtrate from the basic or plumbic 

 acetate and the precipitated lead sulphide removed by filtration, 



The three liquids thus obtained, which for convenience may 

 be denominated i., ii., iii., were then evaporated down and the 

 respective residues examined. 



(i.) It was dissolved in the smallest quantity possible of cold 

 water and diluted with many times its volume of alcohol. After 

 setting aside for twenty-four hours a precipitate, fell, giving the 

 general characters of parapectin. The supernatant liquid on 

 evaporation left a scaly residue, astringent to the taste, and 

 perfectly soluble in water. Its aqueous solution reduced Feh- 

 ling and gave a copious bluish black precipitate with ferric 

 chloride. Lime-water produced a bright golden-yellow colour, 

 followed by a reddish-brown precipitate. From the tannins 

 proper it differed in that it was not precipitated by solution of 

 gelatine. 



(ii.) This residue apparently consisted of pectin intermixed 

 wdth small portions of No. iii. 



(iii.) This was a dark uncrystallixable treacly -looking resi- 

 due, which imparted to the palate a feeble sensation of sweet- 

 ness. It was veiy soluble in water and reduced Fehling^s 

 solution abundantly. A strong aqueous solution was precipi- 

 tated by absolute alcohol. 



D. Tlie marc from the alcoholic extraction was finally perco- 

 lated to exhaustion with cold water. The liquor was evaporat- 

 ed down and the extract obtained taken up with hot water, A 

 considerable amcutit of albuminous matter, which remained 

 insoluble, was removed bv filtrntion. The filtrate was treated 



