228 MR. E. SCHUNCK ON THE 



but exhibits no further change. The analysis of the lead 

 compound, prepared by adding acetate of lead to the alco- 

 holic solution, filtering and washing with alcohol, yielded the 

 following results: — 



0.7840 grm. dried first in vacuo and then at 100° C. burnt 

 with oxide of copper and chlorate of potash gave 0.6115 grm. 

 carbonic acid and 0.1480 water. 



1.0350 grm. gave 0.2225 grm. chloride of platinum and 

 ammonium. 



0.3785 grm. gave 0.3010 grm. sulphate of lead. 



Hence was deduced the fc .lowing composition : — 



Eqs. Calculated. Found. 



Carbon 40 240 21.06 21.27 



Hydrogen 23 23 2.01 2.09 



Nitrogen 1 14 1.22 1.35 



Oxygen 24 192 16.88 16.78 



Oxide of Lead 6 670.2 58.83 58.51 



1139.2 100.00 100.00 



After deducting the oxide of lead the amount of the other 

 constituents in 100 parts as compared with the calculated 

 composition is as follows : — 



Eqs. Calculated. Found. 



Carbon 40 240 51.17 51.26 



Hydrogen 23 23 4.90 5.03 



Nitrogen 1 14 2.98 3.25 



Oxygen 24 192 40.95 40.46 



469 100.00 100.00 

 In the first part of this paper I gave an analysis of the lead 

 compound of a substance having the formula C40 H^ N0 27 

 which differed therefore in composition from this merely by 

 containing the elements of 3 equivalents more of water. As 

 it was impossible to analyse these substances in an uncom- 

 bined state, there were no means of ascertaining whether in 

 that state they had the same composition, as was most pro- 

 bably the case. 



