212 F. R. MORRISON. 



dark green colouration, and with lead acetate a yellow 

 colouration was obtained. The pure substance softened at 

 185° O., melting with decomposition at about 200° O. (Rutin 

 behaves similarly). 



On combustion, with material dried at 140° O. the follow- 

 ing results were obtained : — 



(1) 0*1194 gram gave 0*2328 gram 00 2 , and 0*0560 gram 



H 2 0. O 53*17, H 5*21, O 41*62. 



(2) 0*2110 gram gave 0*4093 gram C0 2 , and 0*0956 gram 



H 2 0. O 52*90, H 5*03, O 42*07. 



(3) 0*1254 gram gave 0*2420 gram 00 2 , and 0*0578 gram 



H 2 0. C 52*63, H 5*12, O 42*25. 



(4) 0*1100 gram gave 0*2130 gram 00 2 , and 0*0514 gram 



H 2 0. O 52*81, H 519, O 42*00. 



Calculating from these results, the formula appears to 



be C27H13O16. 



Rutin possesses the formula O27H13O16, requiring C53 a 12, 

 H 4*92, O 41*96. 



Products of hydrolysis. — To determine the products of 

 hydrolysis a small quantity of the substance was added to 

 a large volume of water, acidified with sulphuric acid and 

 boiled for about three hours, until the volume of liquid was 

 reduced to one-third of its original bulk. On cooling, pale 

 yellow needles separated out, which were filtered off, 

 washed with water and dried. The crystals thus obtained 

 were soluble in alcohol, which solution gave with alkalies 

 a yellow colouration; on addition of lead acetate a bright 

 orange-red precipitate was produced, and with ferric 

 chloride a dark green colour. The acetyl derivative was 

 readily prepared, the almost colourless crystalline needles 

 melting at 190 - 191° O. (The acetyl derivative of quercetin 

 melts at 190° 0.). The product thus obtained is apparently 

 identical with quercetin. 



