690 PROFESSOR T. ANDERSON ON ANTHRACENE. 
The facts now detailed are sufficient to fix the constitution of anthracene, 
and to show that its chemical relations are of considerable interest. Its formula 
connects it with certain substances derived from oil of bitter almonds; and 
more especially with stilbene, the carbo-hydrogen discovered by LAuRENT, from 
which it differs by two equivalents of hydrogen. A similar relation exists 
between oxanthracene and benzil, as is seen by the following comparison of their 
formule :— 
Anthracene,iy fyi ele.) Cea, Stilbene, sacG 
Oxanthracene, ...,... C,, 0,0, Benzil,. ta eee nO, 
These relations merit a further examination, and I propose to return to the 
subject in a subsequent paper, which will also include the results of a further in- 
vestigation of the anthracene compounds. 

