Journal . ne, the compositionof auilinc-for-rcd is about 333 per cent, aniline, .24-0 percent.;)-toluidine, and 427 per cent, o-toluidiue. The normal red-melt contains the following bodies :— (1.) Arsenious and arsenic acids. (2.) Afai/enta bases r pararosaniline, rosanilinc, roso-toluidine. (3.) Phnsphitie bases: chrysaniline, ehrysotoluidinc. (4.) Indulines : violaniline, mauvaniline. (5.) JJroirn co/ouruig matters, (6.) Ilumus-likc substances of unknown constitution. The partial sci>aration of the various colouring-matters iseffected by means of their different solubilities in diluteacid


Journal . ne, the compositionof auilinc-for-rcd is about 333 per cent, aniline, .24-0 percent.;)-toluidine, and 427 per cent, o-toluidiue. The normal red-melt contains the following bodies :— (1.) Arsenious and arsenic acids. (2.) Afai/enta bases r pararosaniline, rosanilinc, roso-toluidine. (3.) Phnsphitie bases: chrysaniline, ehrysotoluidinc. (4.) Indulines : violaniline, mauvaniline. (5.) JJroirn co/ouruig matters, (6.) Ilumus-likc substances of unknown constitution. The partial sci>aration of the various colouring-matters iseffected by means of their different solubilities in diluteacids and alkalis, aiul the ])roduct,s are brought into themarket as niaijfnta orftivhsiuc crystals (mixture of pararos-aniline and rosaniliiie), cerise (mixture of rosanilines andphospliines), and maroon ( of nianvaniline, browns,and a Ruiall quantity of and iihuspliines). 77ie Red ^fllt.—The operation is perlormed in verticalcast-iron pots A and A (Fig. 1), each of which is A Fig. ^\i •/ Fig. 2.


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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882