Nitrogen determination : 0-1581 grm. salt = 3-53 per cent N. 



Theoretical percentages = Carbon, 19*7 per cent, hydi 

 per cent, nitrogen = 3-26, per cent. 



Pir<thrn IHI ,<<t.ihromnitrobenzoate of Sodium : C 6 H 2 Br p Br m N0 2 

 COONa+3H 3 0. This salt crystallizes from dilute bo 

 needles, often forming bundles. From concentrated solutions it is 

 obtained in almost colorless, broad shining leaflets. Soluble in 

 cold and hot water. The anhydrous salt requires 6-63 per cent 

 Na. Found 6-66 per cent Na. 



Parabrommetabromnitrobenzoate of Potassium: CgHgBrPBr" 1 

 N0 2 COOK. The pun- a<-i,l wa- boik-.l with potassium carbonate, 

 the salt crystallizing from the solution in needles. Very soluble 



Anhydrous salt requires 10-76 per cent K ; found 1 0-61 per cent K. 



Par. f^rotnmetabromnitrobenzoate of Barium : I ( ',11 ... Brl !r 

 N 8 OCOO) 2 Ba+H 2 0. Broad colorless, shining needles, easilj 

 soluble in water. Anhydrous salt lviiuirvs I7t"> per cent Ba; 

 found 17-34 per cent. 



P'ii'nh,-'unm>-t.ib,:, l „„}l,'nh,nr.n.iU) of Calcium : (C @ U 2 B^BT m 



N0 2 COO) 2 #fe-f-3|H 2 0. Obtained l'»v boiling tin- live ari.l with 

 ileum hydrate or carbonate."' Exceedingly difficult to 

 obtain pure. Occurs in red-colored needles, almost insoluble in 

 water. The analysis of the anhydrous salt gave 5-52 per cent Ca; 

 required 5-81 per cent Ca. 



Parabrommetabromnitrobenzoate of Maq,,esinm : (Cgl^BrPBr 1 " 

 NO a COO),.M-. Crystallizes in needles forming star-shaped 

 g» 1 1 I ps. Difficultly soluble in water. Analysis gave 3-25 per cent 

 Mg; required 3*59 per cent. 



Very easily obtained from the preceding acid by heating it 

 with hydrochloric acid and a r f tin. The 



amidmg takes place without any violent action. The acid ooh 

 unites with bases, not with acids. Soluble in a large quantity of 

 water; readily soluble in a mixture of equal parts alcohol and 

 water, from which it crystallizes upon cooling in beau! 

 consisting of minute needles. The fusing point of the acid is 

 225° C, considerably higher than that of a similar acid obtained by 

 Angertein (Dissertation, Gottingen, 1869). Completely decom- 

 posed when fused. A nitrogen determination was made of the 

 free acid. R =4*75 per cent ; found 



at «. 



Parabrommetabromamidobenzoate of Barium : (C 6 H,BrrBr m 

 SH C(* >) a Ba+4H, O. An aqueous Solution of the sodium salt 

 was decomposed with barium chloride, the precipitate filtered and 

 washed. The salt forms minute ahimne needles, generally united 



i shining needles, generally i 



