ON THE ACTION OF LIGHT UPON DYED COLOCKS. 375 



Wool Book II. 



Eosins. 13. Rose Bengale NTO. Alkali salt of tetra-iodo-dichlor-fluorescein. 



„ 14. Phloxin. Same as 9. 



„ 15. Rose Bengale NT pure. Same as 13. 



„ 16. Bengaline PH. Sodium salt of tetra-iodo-tetra-chlor-fluorescein. 



„ 17. Bengal Red B. Potassium salt of tetra-iodo-tetra-chlor-fluorescein. 



S. and J. 330. 



„ 18. Cyclamine. Eosin from thio-dichlor-fluoresce'in. S. and J. 334. 



Azine Colours. Safranines, Sec 



Basic Reds. 6. Safranine B extra. From 1 mol. ^-phenylene-diamine and 2 mols. 



aniline. S. and J. 356. 

 „ 7. Safranine T extra. From 1 mol. j:>-toluylene-diamine, 1 mol. aniline, 



1 mol. o-toluidine. S. and J. 358. 

 „ 8. Diamido-phenazin-nitrate. Tolu- safranine -nitrate. 



„ 9. Neutral Red. From dimethyl-diamido-toluphenazine hydrochloride. 



S. and J. 353. 

 „ 11. Fuchsia. From 1 mol. dimethyl-^-phenylene-diamine and 2 mols. 



aniline. S. and J. 357. 



Induline Colours. Rosindulines. 

 Wool Book I. 



Acid Reds. 9. Rosinduline 2 G. Constitution not published. 

 „ 30. Rosinduline G. Constitution not published. 



Azo Colours. 



Acid Reds. 43. Roxamine. From azo deriv. of naphthionic acid and dioxynaph- 

 thalene (2-7). 



Notes. — Among the eosins, eosin BN is distinctly faster than the rest ; 

 cyanosin B fades as rapidly as the rest during the first ' fading period,' 

 but the pale tint then left is remarkable for its fastness, since it remains 

 almost unchanged even after a year's exposure. 



The eosins, rosindulines, and roxamine do not alter in tint when 

 fading, but the safranines leave, at the end of the first ' fading period,' a 

 dull brownish-pink tint. 



Class II. Fugitive Colours. (Wool.) 



The colours of this class show very marked fading at the end 

 of the second 'fading period' (June 14 to July 21, 1892), and after a 

 year's exposure they have entirely faded, or only a tint remains. 



Triphenylmethan Colours. Rosanilines. 

 Wool Book II. 

 Basic Reds. 12. Fuchsin MN. Rosaniline hydrochloride. 



„ 13. Para-rosaniline. Para-rosaniline (base). 



„ 14. Rosaniline. Rosaniline (base). 



„ 15. Acetic acid Rubin. Rosaniline acetate. 



„ 16. Magenta. Rosaniline hydrochloride. 



„ 17. New Magenta. Tri-methyl-^-rosaniline-hydrochloride. 



Wool Book I. 



Acid Reds. 99. Acid Magenta. Alkali salt of rosaniline-tri-sulphonic acid. S. and 

 J. 279. 



Phthaleins. 

 Wool Book II. 



Basic Reds. 1. Rhodamine. Phthale'in of diethyl-m-amido-phenol (basic hydro- 

 chloride). S. and J. 331. 

 „ 2. Rhodamine B extra. As No. 1. 



