MR. WATSON SMITH ON ISODINAPHTHYL. 27 



whilst the isodinaphthyl obtained by myself would stand 

 ch ch ch CH 



/ 



C CH P> Dinaphthyl. 



Melting-point = 204° C. 



Analogously, the a and /3 naphthols investigated by 

 Wichelhaus, and also by Schaeffer (Ann. d. Chemie und 

 Pharm. clii. 281), would appear thus : — 



a Naphthol. 



Melting-point = 94 C. 

 Boiling-point =279° C. 



(3 Naphthol. 



Melting-point =122° C. 

 Boiling-point =287° C. 



(OH) 



Action of Chlorine. — The effect of passing chlorine to*- 

 gether with naphthalin vapour through a red-hot tube was 

 also tried in such a way that the vapours should only come 

 into contact in the hot tube. It was then found that com- 

 plete decomposition took place, with large separation of 

 carbon in dense black smoke. 



I cannot conclude without heartily thanking Mr. Barrow, 

 in the laboratory of whose works these experiments were 

 carried out, for his kind assistance. My sincere thanks 

 are also due to Prof. Roscoe and Mr. Schorlemmer for 

 their kindness in placing the combustion-apparatus in 

 Owens College laboratory at my disposal, and for their 

 kind attention to me whilst there engaged. 



