Certain New Derivatives in the Aroviatic Series. 



181 



Bordeau G, in which instance amidoazotoluolmonosulphonic acid 

 is used. 



In part II of this thesis three new dyes are described which have 

 been made from the Schoellkopf's acid by different amido derivatives. 



YI. In proving that bromine was not advantageous, the work 

 simply resolved itself to the making of a series of well-known dyes, 

 and then making dyes of precisely similar character, starting with 

 chemicals into which bromine had been introduced. Three atoms 

 of bromine were used in all the cases. The results show that 

 bromine throws the hue of a dye toward the orange in the case of 

 the azo dyes. In the case of cosines, bromine is essential to the 

 formation of the color ; here it turns the shade away from the 

 desired clear red. The manner in which the work was done is 

 shown in the practical work of the thesis. 



A considerable number of other researches were made in the 

 course of the year, and some of them gave very interesting results, 

 and will lead to further work. But it has been decided not to 

 incorporate them in this thesis, as the main points which the thesis 

 attempts to prove are decided by the results obtained in the work 

 already outlined, and given in detail in the latter part of the work. 

 It may be as well to mention some on this additional work; chrys- 

 aniline when diazotized and linked with alphanaphtol gave a dark 

 purple (sample No. 9), and when coupled with the "G" salt, beta- 

 naphtol-disulphonic acid, 2 : 6 : 8, a bright red dye (sample No. 10). 



Chrysaniline is, 



/\ /^\ /\ 



\/ \c/ \/ 



NH„ 



Benzoflavine, the isomer of Chrysaniline, gave results which were 

 not uninteresting. With alpha-uaphtol it gave a crimson (sample 



