210 MR. E. SCHUNCK ON THE 



V. 0.3640 grm. prepared in a similar manner to the last, 

 gave 0.9020 grm. carbonic acid and 0.1640 water. 



0.4470 grm. gave 0.5070 grm. chloride of platinum and 

 ammonium. 



These numbers correspond in 100 parts to — 



i. ii, in. iv. v. 



Carbon 59.41 60.51 60.61 66.41 67.58 



Hydrogen... 4.62 4.59 4.88 4.94 5.00 



Nitrogen 5.78 6.02 6.43 7.12 



Oxygen 29.12 28.49 22.22 20.()3 



100.00 100.00 100.00 100.00 

 In passing the eye along these numbers it will be seen that 

 the amount of oxygen decreases progressively from II. to V., 

 while that of the other constituents increases. These two 

 analyses represent in my opinion the composition of the two 

 extreme members of a series, the intermediate members of 

 which consist of mixtures or compounds of the two. A number 

 of other analyses which I made gave results which can only be 

 explained on the supposition that there are two bodies having 

 the same general properties which I have ascribed to indifu- 

 scine, but a different composition. Of the above analyses the 

 two first agree tolerably well with the formula C24 H 10 N0 9 , 

 whereas the last leads to the formula C22 H 10 N0 5 , as the 

 following calculation will show : — 



Eqs. Calculated. Eqs. Calculated. 



Carbon 24 144 60.00 22 132 67.34 



Hydrogen. . 10 10 4.16 10 10 5.10 



Nitrogen . . 1 14 5.83 1 14 7.14 



Oxygen ... 9 72 30.01 5 40 20.42 



240 100.00 196 100.00 



It will be seen that the two formulae differ from one another 

 by 2 equivalents of carbonic acid, and hence the name of 

 Indifuscone might not be inappropriate for the body whose 

 composition is expressed by the second formula C22 H 10 N0 5 . 



