266 PROCEEDINGS OF THE AMERICAN ACADEMY 



0.5017 g:rra. of the salt dried at 110° gave on ignition with II^SO^ 

 0.1873 grm. BaSO^. 



Calculated for 

 Ba(C3lI(OCoIIj)Br02)j. Found. 



Ba 22.06 21.95 



Calcic Phenoxybromacrylate. Ca(C,H(OCgH5)BrO,)2.5ri,0. The 

 calcium salt was prepared from the acid by neutralizing its aqueous 

 solution with calcic carbonate. It was readily soluble in water, and 

 crystallized on cooling its concentrated solution in clustered needles, 

 which were permanent in tlie air or over sulphuric acid. 



I. 0.93G1 grm. of the air-dried salt lost at 100-105° 0.1381 grm. II.O. 

 II. 0.75G3 grm. of the air-dried salt lost at 100-105° 0.1122 grm. II.p. 



0.5046 grm. of the salt dried at 100-105° gave on ignition with 

 HjSO, 0.1310 gr. CaSO,. 



Calculated for 

 Ca(C3lI(OCoII-)Br02)i. Found. 



Ca 7.G4 7.G4 



Argentic Phenoxyhromncnjlate. AgC3lI(OCgH,)BrO.^. The silver 

 salt may be precipitated by the addition of argentic nitrate to a hot 

 aqueous sojution of the acid. It crystallizes in needles which may be 

 recrystallized without decomposition from boiling water. When dried 

 over sulphuric acid, the salt gave the following results : — 



I. 0.4464 grm. of the salt gave on precipitation with IlBr 0.2391 

 grm. AgBr. 

 II. 0.4240 grm. of the salt gave on precipitation with lIBr 0.2268 

 grm. AgBr. 



Calculated for Found. 



AgC3n(0C„II-)Br02. I. II. 



Ag 30.85 30.77 30.72 



Pheno.xybromacrylic acid is therefore one of the products formed 

 from mucopheno.xybromic acid by the action of potassic hydrate. The 

 mother licpior.'^ from which the potassic pheno.xybromacrylate had crys- 

 tallized yielded on acidKication with dilute sulphuric acid and distil- 

 lation an acid distillate, which gave with ferric chloride and bromine 

 water reactions showing the presence of small quantities of phenol. 

 When neutralized with calcic carbonate and evaporated, it left calcic 



