1887.] ^^^ [Smith. 



analysis showed 9.09% H,0 and 8.25% Na ; theory" requires 9.89% HjO 

 and 8.40% Na. 



The calcium salt is anhydrous. Its analysis gave 7.42% Ca, while 

 theory requires 7.39%. 



The zi}ic salt forms small crystals, much like fish-eggs. It dissolves 

 with difficulty in hot water. When analyzed it gave 13.91% HjO and 

 12.24% Zn ; the theoretical figures are 14.06% H2O (5 molecules), and 

 11.94% Zn. 



The magnesium salt does not crystallize well. It is not readily soluble, 

 even in hot water. It contains six molecules of water of crystallization. 

 Upon analysis I obtained 17.19% HjO and 5.33% Mg. The calculated 

 percentages of waler and magnesium are 17.03% and 4.79%. 



The cadmium salt forms beautiful crystals. 



The silver salt was obtained as a white precipitate insoluble in water. 

 I employed it in preparing the methyl and ethyl esters. 



MetJiyl Ester [C^U^ OH BrCl CO OCE^). This was obtained by the 

 action of methyl iodide upon the silver brom-chlorsalicylate. It forms 

 beautiful needles, dissolving with difficulty in both alcohol and ether. It 

 melts at 126-127° C. This ester was burned with lead chromate, and 

 gave good results. The etiiyl ester, also prepared, was not further studied. 



The free brom-chlor acid was burned with lead chromate. The result 

 showed 33.07% carbon and .96% H. Theory requires 33.46% C and 

 1.53% H. 



lodo-hrom-salicylic Acid. 

 CfiH^ OH IBr COOH. 



Metabrom-salicylic acid was first prepared, and then iodated by the 

 method of Weselsky. Little heat was evolved in the reaction ; sometimes 

 this was added by means of the water-bath. When the reaction was com- 

 plete the alcoholic solution was removed to an evaporating dish and run 

 down to dryness. The residue was boiled with water and barium car- 

 bonate ; from the hot filtrate the barium salt crystallized out, but it was 

 immediately converted into the sodium salt, from which I set the acid free. 

 The latter forms small, beautiful needles, dissol"v^ing with difliculty in hot 

 alcoholic water. It melts at 208-209° C. A combustion of the pure acid 

 gave 24.17% carbon and 1.30% H, instead of 24.48% C and 1.17% H. 



The barium salt contains three molecules of water. It forms branched, 

 purple-tinted needles. An analysis gave 6.48% HjO and 15.55% Ba, in- 

 stead of 6.27% H2O and 15.65% Ba, as required by theory. 



The sodium salt contains one molecule of water. It forms nodules, 

 consisting of silky needles, very soluble in water. When analyzed it 

 yielded 5.20% H2O and 6.08% Na ; theory requires 4.70% H^O and 

 G.30% Na. 



The calcium salt resembles the barium salt in form ; it is possibly some- 

 what more soluble in hot water. It contains four molecules of water. Its 



PROC. AMER. n'HILOS. SOC. XXIV. 126. 3C. PRINTED DEC. 29, 1887. 



