212 MR. E. SCHUNCK ON THE 



centrated sulphuric acid dissolves it in the cold, forming a 

 brown solution, which when boiled becomes black and dis- 

 engages sulphurous acid. Boiling nitric acid decomposes it 

 with an evolution of nitrous acid, giving a yellow solution, 

 which on evaporation leaves a brown residue consisting of a 

 resinous substance insoluble in water and a little picric acid. 

 When it is treated with boiling caustic soda lye only a trace 

 of ammonia is given off, but when heated with soda-lime 

 there is a much stronger evolution of ammonia. A boiling 

 solution of bichromate of potash to which sulphuric acid has 

 been added slowly decomposes it with an evolution of gas 

 while the liquid becomes green. The solution in ammonia 

 is brown and gives brown precipitates with the chlorides of 

 barium and calcium and with nitrate of silver, while the 

 liquid in each case becomes colourless. The alcoholic solu- 

 tion gives with acetate of lead a brown precipitate, which 

 dissolves entirely on the addition of acetic acid, and with 

 acetate of copper it gives a slight brown precipitate, the 

 filtered liquid being still dark brown. 



In the first part of this paper I have given for indiretine 

 the formula C 36 H20 NO ]3 . The analyses, which I have 

 made with fresh preparations of this body, lead to the formula 

 Cag Hi 7 NO10, as will be seen from the following details. 



I. 0.3955 grm. dried at 100° C. and burnt with oxide of 

 copper and chlorate of potash gave 0.9565 grm. carbonic acid 

 and 0.1995 water. 



0.5215 grm. burnt with soda-lime gave 0.1400 grm. pla- 

 tinum. 



II. 0.4250 grm. of the same preparation heated to 190° C. 

 and then kept for several hours at 100° C. gave 1.0300 grm. 

 carbonic acid and 0.2090 water. 



0.5065 grm. gave 0.1370 grm. platinum. 



III. 0.4210grm. of a different preparation gave 1 .0200grm. 

 carbonic acid and 0.2140 water. 



