50 V. T. CLEVE, 



0,3?35 gr. gave 0,1825 gr. metallic platinum, 0,iöoo gr. chloride of silver = 0,0371 gr. 

 chlorine, and 0,2130 gr. sulphate of barium = 0,0292 gr. sulphur. 



2. the compound prepared with the chloride of platinsemidiammine. 



0,3423 gr. gave 0,1935 gr. platinum, 0,1390 gr. chloride of silver =0,0344 gr. chlorine, 

 and 0,2200 gr. sulphate of barium =0,0314 gr. sulphur. 



The formula requires: 



Theory Experiment 



1 2 



Platinum 197,88—56,80 56,41 56,53 



Chlorine 35,40 — 10,18 11,40 10,05 



Sulphur 32,oo — 9,18 9,02 9,18 



Nitrogen 28,oo 



Oxygen 48,00 



Hy drogen 7,00 



348,34 



12. Chloro-ammonio-sulphite R0 2 (SO) 3 | 3 ^ C1 4 +2H,0, was obtained when the chlo- 

 ride of platosemidiammine (in excess) was boiled with a solution of the ammonio- 

 sulphite, RO, . 3(SO) . 4 . 4NH 4 . (N:o 13). On cooling the liquid the excess of the chlo- 

 ride of platosemidiammine crystallised and, when alcohol was added to the solution, a 

 heavy oil was thrown down. It was soon soliclified by the formation of crystals. The 

 crystalline mäss thus obtained was dissolved in water and again precipitated with al- 

 cohol. The compound forms easily soluble, and voluminous colourless needles. 



Analysis: the sulphite dried at 100°. 

 O/.020 gr. gave 0,1905 gr. metallic platinum, 0,080 gr. chloride of silver =0,0198 gr. 

 chlorine and 0,3350 gr. sulphate of barium =0,0460 gr. sulphur. 



The formula requires: 



Calculated Experiment 



Platinum 395,70 — 47,72 47,39 



Chlorine 35,46 — 4,28 4,92 



Sulphur 96,00—11,58 11,44 



Nitrogen 98,oo 



Hydrogen 28,oo 



Oxygen 176,00 



829,22 



By the action of sulphite of ammonium upon the chloride of platosemidiammine 

 Mr Peyrone *) obtained white needles, for which he gives the equival. formula: Pt . N 4 



l ) Peyrone Ann. Ch. u. Pharm. 61. 1847. p. 180. 



