116 APPENDIX. 



mass. Tlie insoluble lead soap, after separation of lead, afforded 



tempe 



point of 48*^. 



pure, and no 



attempt was made to ascertain whether they consisted of single acids 

 or mixtures. The presence' of glycerine was^ determined in the 

 original aqueous sulphuric acid solution • The aqueous acid solution 

 of the alcoholic extract of the roots, after treatment with petroleum 

 ether, was agitated with ether. The ethereal solution was allowed 



sulphuric acid. 



eously 



and 



tacky with tar-like odour ; it amounted to '123 per cent., calcu- 

 lated on the roots containing 6'23 per cent, of moisture. Waimed 



with 



solution 



din 



Reaction, strongly acid. 



Fe^CP gave a dirty greenish coloration, passing i-apidly to 



dirty brownish. 

 AgNO*^ slight turbidity ; on warming Ag. reduced. 

 Aqueous NH% orange yellow coloration. 

 Acetate of lead, dirty yellowish, white ppt. 

 Gelatine, no precipitate. 



KCN., no reaction. 



That portion of the ether extract insoluble in warm water was treated 

 with aqueous NaHO, and the dark brown solution which resulted 

 agitated with ether. The ether solution exhibited slight fluorescence^ 

 and on spontaneous evaporation afforded a yellow czystalline deposit^ 

 which appeared as needles and rosettes on microscopic examination. 

 By treating this residue with proof spirit a certain amount of 

 neutral resinous matter of a yellow colour was separated. This was 

 precipitated on dilution with water. The insoluble crystalline residue 

 afforded no crystalline sublimate when heatecl between watch glasses. 

 The aqueous soda solution of the ether extract was mixed with 

 dilute sulphuric acid and reagitated with ether. The ethereal extract 

 was of a yellowish -brown colour, strongly acid in reaction, and had 

 the properties of an acid resin. 



The tartaric acid solution of the alcoholic extract of the drug was 

 now mixed with a very slight excess of sodium bicarbonate and again 

 agitated with ether. After agitation and on subsequent standing, 

 » small quantity of a white crystalline substance separated, wjiicb 



