OF ARTS AND SCIENCES. 225 



acid employed was obtained from anthranilic acid by means of the 

 Sandmeyer * reaction, which, as in the case of the metachlor acid 

 above mentioned, we found admirably adapted to our purpose. 



I. Orthobrombimzoic Anhydride. 



Crystallizes from ligroine in fine, white, prismatic needles melting 

 at 141°. Readily soluble in ether and chloroform, less easily in 

 benzol, alcohol, and ligroine. The analyses gave : — 



0.1663 gr. substance gave 0.1615 gr. AgBr. 

 0.1832 gr. gave 0.2928 gr. CO^ and 0.0390 gr. Hp. 



II. Ifetabrombenzoic Anhydride. 



Crystallizes from benzol in glittering white leaflets melting at 97*^ 

 Readily soluble in ether and chloroform, less easily in alcohol, benzolj 

 and ligroine. The analyses gave : — 



III. Parahrombenzoic Anhydride. 



Crystallizes from benzol in thick prisms, from chloroform in small 

 tablets. Is decidedly more insoluble in the common organic solvents 

 than either the ortho or the meta isomer. Melting point 212 to 213°. 

 This body has already been described by Jackson and Rolfe ; f we have 

 therefore considered an analysis unnecessary. 



* Ber. d. ch. G., XVIII. 1495. t These Proceedings, XXII. 256. 



VOL. XXVIII. (n. S. XX.) 15 



