of the Aromatic Nucleus. 



409 



CH 



CO 



C\l 



CH 



> 





CH 



r i 



r 



%, 



L J 



k 



^ 



n 





rT 



CH 





CH 



Pyrene, C 16 H 10 . 



Pyrenequinone, C ]6 H 8 2 . 



I. 



CH 



CH 



CH 



CH 



f. 



\. 



CO 



% 





c 



f "\ 



r ^ 



Ss. /^ 



C\ y^ 





-x 



1 



CO 



CH 



I 



'yreiK 



equine 



)ne. 



CH 



CH 



It is quite inconceivable that the carbon atom Al should be 

 directly linked to Cl as in formula I ; or A2 to C2 as in II. 



I shall endeavour to show that the proved constitution of 

 this body is an important link in our argument. In the first 

 place, it is quite impossible to represent it as a conjugation of 

 four of Kekule's rings. 



