OF ARTS AND SCIENCES. 293 



decomposition. It forms irregular rhombic plates, which are very 

 slightly soluble in cold water. 



0.G191 grra. of the salt dried over H.^SO^ gave 0.26G0 grm. AgCl. 



Calculated for AgCjCljBrO,. Found. 



Ag 33.03 " 32.34 



Since /8-dibromacrylic acid has been shown * to have the structure 

 represented by the formula, 



CBr, 



II 



CH 



I 



COOH, 



the chlorine addition-product would naturally have the form, 



CBrXl 

 I 

 CHCl 



I 



COOH, 



and to the corresponding /3-bromdichloracrylic acid must be assigned 

 the formula, 



CBrCl 



I! 



CCl 

 I 

 COOH. 



IV. — ON ORTHOIODTOLUOLSULPHONIC ACID. 

 By Charles F. Mabery and George H. Palmer. 



HiJBNER and Glassnerf found that, when paraiodtoluol was dissolved 

 in chloroform and treated with the calculated amount of sulphuric 

 anhydride, two acids were formed, which they called a- and /3-paraiod- 

 sulfitoluols. On trying the same reaction with orthoiodtoluol prepared 

 from orthotoluidin by means of the diazo reaction, we were unable to 

 effect any change in a chloroform solution, either in the cold or by the 

 application of heat. But when sulphuric anhydride freshly distilled 



* H. B. Hill, these Proceedings, Vol. XVII. p. 151. 

 t Berichte deutschen Chem. Gesellsch., viii. 660. 



