OF ARTS AND SCIENCES. 



295 



bromide; 72 gr. of the solution gave 1.4724 gr. of the diethylether 

 of trinitrophloroglucine. The organic matter insoluble in water 

 weighed 5.51 gr. 



VIII. Weight taken, 1.2524 gr. Weight of aqueous solution, 



37.3 gr. ; 24.2 gr. of the solution gave 14.3 c.c. of nitrogen from the 

 sodic nitrite at a temperature of 19° and a pressure of 771.5 mm. ; 

 13.1 gr. of the solution gave 0.4097 gr. of argentic bromide. The 

 organic matter insoluble in water weighed 0.55 gr. 



IX. Weight taken, 1.2682 gr. Weight of the aqueous solution, 

 38.1 gr. ; 19.7 gr. of the solution gave 12 c.c. of nitrogen from the 

 sodic nitrite at a temperature of 24° and a pressure of 767.3 mm. ; 



18.4 gr. of the solution gave 0.5082 gr. of argentic bromide. The 

 organic matter insoluble in water weighed 0.58 gr. 



X. Weight taken, 1.2287 gr. Weight of the aqueous solution, 

 53.65 gr. ; 17.65 gr. of the solution gave 7.7 c. c. of nitrogen from 

 the sodic nitrite at a temperature of 25° and a pressure of 

 766.1mm.; 18.9 gr. of the solution gave 0.2664 gr. of argentic 

 bromide, and 0.0854 gr. of the diethylether of trinitrophloroglu- 

 cine. The organic matter insoluble in water weighed 0.68 gr. 



In the following tables the first column gives the number of the 

 experiment, and the weight of tribromtrinitrobenzol used; the sec- 

 ond, the percentage of nitrogen removed as sodic nitrite referred to 

 the total amount of nitrogen which could be removed from the tri- 

 bromtrinitrobenzol by this reaction, that is, two out of the three 

 atoms of nitrogen, because the product C 6 Br3N0 2 (OC 2 H5) 2 contains 

 one nitro group; the third column gives the percentage of the total 

 bromine removed as sodic bromide; the fourth, the weight of the 

 organic matter insoluble in water; the fifth, the weight of the di- 

 ethylether of trinitrophloroglucine; and the sixth, the weight of 

 trinitrophoroglucine calculated from the volume of nitrogen ob- 

 tained from the residue after acidification with sulphuric acid. 



