OP ARTS AND SCIENCES. 



173 



with a dilute solution of sodic carbonate. Tlie crude product con- 

 tains impurities which can be removed only by repeated recrystal- 

 lization from alcohol. This recrystallization is more conveniently 

 accomplished if the moderately saturated solution is cooled to 0°. 

 The ether crystallizes in large, transparent forms of the monoclinic 

 system, which melt at 50-51° and boil at 255-2G0° with partial 

 decomposition. When slightly warmed it has a pungent, aromatic odor. 

 The analysis of substance dried in vacuo over sulphuric acid gave : 



I. 0.8583 grm. substance gave 0.7933 grm. COg and 0.1686 grm. 



H,0. 

 II. 0.7000 grm. substance gave 0.6432 grm. CO^ and 0.1377 grm. 



Calculated for CtHBrjOj . (!jHg. Found. 



I. II 



C 25.17 25.24 25.05 



H 2.10 2.18 2.18 



Mr. Mabery has studied the crystalline form of this substance, and 

 obtained the following results : — 



CRTSTALLINE FORM OF ETHYL MUCOBROMATR. 



ooi 2 



Monoclinic System. 

 Forms observed,— {111} {111} {100} {001} {HO}. 

 a:b:c= 1.053 : 1 : 1.221 ; ac = 78° 27' 



