Chemistry and Physics. 377 



hi bundles. Very soluble in water. Analysis of anhydrous salt 

 gave 18-90 per cent Ba; required 18-89 per cent. 



/'"'•<//,;• it, of ('<tb-'n>m : |( , 1 .IIJ , ,r \W< 



^H,COO) 2 Ca+4iH 2 0. Obtained by decomposing the ammo- 

 mum salt with calcium chloride. The" salt is tolerably insoluble 

 in water, crystallizing from it in small reddish-brown colored 

 needles. Analysis gave 6'37 per cent Ca; required 6-51 percent 



Parabron ./. of Strontium : (CgfiLBr Br 



' .>r+-JH 2 (). Large, dark-red colored needles"! DitK- 

 cultly soluble, in hot water. An analysis of the anhydrous salt 

 gave 12-55 per cent Sr; required l-j-93 per cent Sr. 

 J'" ■■>'■.': ,n f. ,/„.,,„ , ni ;,!,,i«„ Z n<,ti of Copper: (CeHgBri'Br 1 " 

 ML,( O0) 2 Cu. From the ammonium salt by treating it with 

 copper acetate. Bright green in color; perfectly insoluble in 

 water. Analysis : 923 per cent Cu found ; required 6'70 per cent 



C 6 H 2 BrPBr m Br?COOH. Fusing point 195° C. 



I obtained this acid by converting the preceding bibromamido- 

 benzoic acid, by mean-' of nitrous e id. into the corresponding 

 diazo-compound" and then boiling thl- last product with pure 

 concentrated hydrobromic acid. The pure acid obtained from the 

 barium salt after many recrystallizations, presented the constant 

 :.t S 05 : C. 'The acid is almost perfectly insoluble in 

 Water. Very -olubje in a mixture ..:' one part water and two 

 parts of alcohol, recrystallizing out of this in small colorless 

 needles. Fuses with partial decomposition. 



Tnhrombenzoate of Lead: (< ,I J1 >- Ob- 



tained by precipitating the ammonia salt with lead acetate. It 

 forms a white insoluble compound. This salt was taken in esti- 

 mating the carbon and hydrogen. Found 11-98 per cent carhon, 

 and 0-89 per cent hydrogen. Calculated 18-20 per cent carbon, 



defermiued by burning the pure acid wi 



oxide of lime and the calcium bromide decomposed by 

 nitrate. Found percentage of bromine, 66-85 per cent ; calculated 



tm : (C, M 2 BrP Br" Br ? COO) 2 Ba + 

 t acid is boiled with barium carbon- 

 ate. The pure salt forms needle- ea-ih solubl. in water. The 

 anhydrous - ave 15-53 per cent Ba; calculated 



16 06 per cent Ba. 



Parajjkomm.j! v;.m'\t< xvbkxzoic Acid. 



C 6 H !? BrPBr™OH?COOH. Fusing point 218° C. 



An etherial solution of parabrommetabromamidobenzol- acid 



compound formed, and being msol floccalent 



id, perfectly dry, was boiled with pur< 



