V. MAX (JFACXURE8. 



655 



Commercial Name. 



C 6 H 



H 18 N 



i-j 



C 6 H 



Sodium tri-phenyl-rosaniliue sul- 

 phonate 



Tri-phenyl-rosaniline sulphonic 

 acid 



Sodium phenyl-rosaniline sul- 

 phonate 



Di-phenyl-rosaniline acetate 



Calcium tri-phenyl-rosaniline di- 

 sulplionate - ... 



Methyl-rosaniline hydrochlorate 

 (fused) .... 



Di-methyl-rosaniline hydrochlo- 

 rate (fused) - CCHs 



Rosaniline hydrochlorate (fused) - C 20 H 19 N 3 HC1 



rCgoHis 



Tri-methyl-rosaniline methyl io- } CH 3 

 dide 1CH 3 



Anthracene - 



Alizarin 



Anthrapurpurin 



HSO 3 



C 2 H 3 2 



CgH 

 C 6 H 5 



ct? 18 ** HC1 



Fast blue, 6B. 



Alkali violet. 

 Atlas blue. 



Soluble blue. 



Hofinami violet cake R. 



Hofmann violet cakeBB. 

 Roseine cake. 



Iodine green crystals. 



Anthracene. 

 Alizarin (blue shade). 

 Alizarin (red shade). 



247 6 a. Chrysoidine, a new basic orange dye for silk, 

 wool, cotton, leather, &c. Manufactured by the exhibitors. 



Williams, Thomas, and Dower. 



Chrysoidine is, according to quality, the sulphate or hydrochlorate of a new 

 bi-acid base, belonging to the benzene eeries. It is a valuable orange-yellow, 

 and owing to the readiness with which it crystallizes, can be obtained in a 

 state of perfect purity. Except phosphine, it is the only basic yellow dye 

 known, and as it is the result of a direct process (not a secondary product) 

 it can be obtained at a much lower price than phosphine, which it equals, and 

 in some of its applications surpasses in strength and beauty of shade. It dyes 

 in neutral or slightly basic baths, and has a great affinity for silk, wool, and 

 even for uumordanted cotton. Mordanted cotton is dyed a yellow or orange 

 shade according to the mordant employed. It combines readily with magenta 

 and other red colours, giving rise to very clear and beautiful scarlets. The 

 Chrysoidine was discovered quite recently in our laboratory by Dr. Otto N. 

 Witt. 



245Oa. Models of Stoneware Distilling Apparatus as 



used by Manufacturing Chemists, and others, and comprising 

 still, still head, false arm, dip arm, condensing worm, three 

 receivers with connecting pipes and taps, mixing pan, and stone 

 jar. Made of improved vitrified stoneware, and warranted to 

 resist the action of the strongest acids. James Stiff Sons. 



2450b. Model of Hofmann's Patent Kiln. 



Hermann Wedekind. 



2450c. Drawing of Bull's Patent Kiln. 



Hermann Wedekind. 



