96 Proceedings of the Royal Irish Academy. 



slowly added, drop by drop, at such a rate that the total quantity was used 

 up by the end of the second day. The mixture on standing overnight was 

 heated on a water-bath to 80° C, saturated with common salt, and maintained 

 a,t this temperature for half an hour. The precipitated colouring matter was 

 filtered and purified by repeated separations, on cooling, from hot dilute 

 alcohol. 



•1624 substance gave 16*2 c.cs. moist nitrogen at 16° C. and 764 mm. P., 

 corresponding to N = 11-68, 

 C.HjAXcNaA requires N = 11-76. 



The dye-stuff is a dark-bluish amorphous powder soluble in water to a 

 deep-red solution. It gives direct on cotton a fine deep-purple shade. 



