OF ARTS AND SCIRNCKS. 77 



constitution of naphtaline as follows : bromorthobenzoylbenzoic acid, 

 prepared by the action of bromphtalic acid on benzol in presence of 

 aluminic chloride, was converted into bromanthrachinone by heat- 

 ing with sulphuric acid, which on fusion with potassic hydrate gave 

 erythoxyanthrachinone, and, as this when oxidized yielded phtalic 

 acid, the conclusion drawn from our experiments that anthracene is a 

 diortho substance is confirmed by his work. 



