1 88 MR. E. SCHUNCK ON THE 



precipitate fell, which was collected on a filter, washed with 

 alcohol and then dried, at first in vacuo, and then for a few 

 hours in the waterbath. This precipitate was employed in 

 the analyses I. and II. The liquid filtered from this precipi- 

 tate gave with a little ammonia a second precipitate of a rather 

 paler yellow colour, which was collected on a filter, washed 

 with alcohol and dried in the same manner as the first. The 

 analyses III. and IV. were made with this precipitate. The 

 following results were obtained. 



I. 1.0120 grm. burnt with oxide of copper and chlorate of 

 potash gave 0.7590 grm. carbonic acid and 0.1885 water. 



1.0330 grm. burnt with soda- lime gave 0.0580 grm. 

 platinum. 



0.6385 grm. gave 0.5140 grm. sulphate of lead. 



II. 0.8845 grm. gave 0.5040 grm. carbonic acid. 



1.1100 grm. burnt with soda-lime gave 0.1260 grm, chloride 

 of platinum and ammonium. 



0.3490 grm. gave 0.3260 grm. sulphate of lead. 



III. 1.3315 grm. gave 0.9380 grm. carbonic acid and 

 0.2535 water. 



1.6295 grm. gave 0.2145 grm. chloride of platinum and 

 ammonium. 



0.8550 grm. gave 0.7005 grm. sulpnate of lead. 



IV. 0.9520 grm. gave 0.6345 grm. carbonic acid and 

 0.1715 water. 



1.2490 grm. gave 0.0640 grm. platinum. 



0.5335 grm. gave 0.4495 grm. sulphate of lead. 



These numbers correspond in 100 parts to 



I. n. III. iv. 



Carbon 20.45 15.54 19.21 18.17 



Hydrogen 2.06 2.1 1 2.00 



Nitrogen 0.79 0.71 0.82 0.72 



Oxygen 17.47 .... 17.58 17.12 



Oxide of Lead.. .. 59.23 68.73 60.28 61.99 



100.00 100.00 100.00 



