236 MR. E. SCHTJNCK ON THE 



at 100° C. gave 0.5740 grm. carbonic acid and 0.1645 water. 



1.2145 grm. gave 0.1210 grm. platinum. 



0.6325 grm. gave 0.5420 grm. sulphate of lead. 



II. 1.3280 grm. of another preparation gave 0.7795 grm. 

 carbonic acid and 0.2145 water. 



1.5600 grm. gave 0.1435 grm. platinum. 



0.8965 grm. gave 0.7715 grm. sulphate of lead. 



Hence was deduced the following composition : — 



Eqs. Calculated. I. II. 



Carbon...... 28 168 15.90 16.13 16.00 



Hydrogen ... 20 20 1.89 1.88 1.79 



Nitrogen 1 14 1.32 1.41 1.30 



Oxygen 23 184 17.44 17.53 17.59 



Oxide of Lead 6 670.2 63.45 63.05 63.32 



1056.2 100.00 100.00 100.00 



After deducting the oxide of lead the composition in 100 

 parts as compared with the theoretical composition is as 

 follows : — 



Eqs. Calculated. I. H. 



Carbon 28 168 43.52 43.65 43.62 



Hydrogen 20 20 5.18 5.08 4.88 



Nitrogen 1 14 3.62 3.81 3.54 



Oxygen 23 184 47.68 47.46 47.96 



386 100.00 100.00 100.00 



Now if the formula of this substance be doubled and the 

 formula of oxindicasine be deducted the remainder will be 

 the formula C^ H 24 NO23, since 



C K H w N 2 O^ = C 28 H 16 NO M + C M H^ NO^ 



The body represented by the last formula and 1 equivalent 

 of indiglucine contain together the elements of indicanine and 

 water, for 



C M K u NO^ + C I2 H 10 12 = Qo H* NO^ +11HO. 



It has therefore the composition which theory would assign 

 to indicasine, and the substance represented by the formula 



