174 



APPENDS. 



in amylic alcohol or cliloroform with a very marked gi-eenish fiuor- 

 escence. An alcoholic solution of the alkaloid did not crystallize, 

 and we failed in obtaining distinctly crystalline salts. A solution 

 of the alkaloid in dilute sulphuric acid afforded with alkaline 

 carbonates and hydrates a bulky white precipitate ; but even after 

 repeated precipitation and I'o-solution, the physical characters of 

 the alkaloid were not materially altered, and its solution in amylic 

 alcohol or chloroform still showed a marked fluorescence, A solution 

 of the alkaloid in dilute sulphuric acid, when agitated with animal 

 charcoal, completely lost its bitterness, the solution being at the same 

 time completely decolourized. The alkaloid could be again separated 

 from the charcoal by treatment with warm alcohol, the physical 

 characters being unaltered. 



The following colour reactions wei^e noted, pure brucine being 

 tested at the same time as a control : 



Eoagent. 



Brucine, 



Alkaloid &uspeeted to 

 be Brucine. 



Cone, sulph. acid con- 

 taining a trace of 

 nitric acid. 



Cone, hydroc. acid ,,, 



Acetic acid ... 



Cone, nitric acid 



Pink ... 



• •■ 



»« • 



*« i 



Yellow. 



• « • 



• • » 



■ •* 



ColoTirless 



Colourless 



Scarlet, soon passing 

 yellow- 



»«f 



* « V 



into 



Sulph. acid and bi- 

 cliromate of potash. 



Sulph. acid and MnO^. 



Yellow, with tinge of red ... 



Chlorine 



'•• 



■ . > 



Mercui'ous nitrate, 

 with Blight excess 

 of IINO^ 



Mayer's reagent 



Nitric acid and SuCl^. 



Sulphuric acid and 

 potassium nitrate. 



Siilphocyanido of po- 

 tftsflium. 



Orange 



• ■• 



* 



Red ; colour soon discharged, 

 decolouiized bj^ammouia- 



Pink on warming, colour 

 deepens on standing. 



Pale yellowish ppt . , floe - 



culent. 

 Purple, discharged by excess 



of both reagents. 

 Red, changes soon into 



yellow. 



Wliite ppt,, sol. in excess of 

 acetic acid, repptd. by 

 NaHO. 



Yellow. 



Yellow. 



Soarlet, does not become 

 yellow so soon as the 

 brucine, but only^ after 

 standing for some time. 



Slight piii-ple, not unlike 

 the strychnia reaction, but 



not so marked. 

 Violet, changiBg to dark 



brown. 

 Red : colour not so soon 

 discharged, decolourized 



by aniinonia. 

 Yelled on warming, but 

 no piuk colour. 



Palo yellowish ppt., floe- 



culent. 

 No purple colour. 



Red, with greenish -purple 

 tint at the edges; red 

 colour deepens on stand- 

 ing. 



White ppt., sol. m excess 

 of acetic acid, repptd. by 

 NaHO. 



