428 W. G. Mixter—Ethylidenamine Silver Sulphate. 
Calculated for 
Ag,SO,(C,H,NH);NH;3H,O 
v. 
A 42°20 42°08 2 41°08 2 41°07 2 
C 14-06 13°92 59 14°78 64 14°77 674 
H 4°69 4°91 4°88 
N 10:90 10°64 
* * kK *REK KK Ee KR kRK K * 
3H,O0 10°15 10°20 ! 
The following results were obtained from crystals of an — 
entirely different habit from those used in the preceding analy- — 
ses, many of the crystals were one or two centimeters long, 4or 
5mm wide, and 1 to 8™™ in thickness. They were freed from — 
the mother liquor in the manner already described. 
Calculated for Caleula 
Ag,SO,(C,H,NH),6H,O VI. Ag,S0,(C,H,NH), VIl. 
Ss b* 526 1 —_—_— 
Ag 36°48 36°12 2 44°64 44°70. 2 43°89 2 4 
© 16°21 15°66 7°8 19°83 18°72 76 18°79 7°6 q 
H 5°41 56 4°13 4°43 . 4 
* * * * *K * * *K * * * RRR KR 
N 9°46 9°06 3°9 
6H,O 18°24 17°29 17°67 
The atomic relations between the silver and carbon found are 
expressed by the figures following the percentages. om- 
oxide, lead chromate and metallic copper. The silver in ad 
VI was weighed as chloride, and the other silver estimations 
were from weighing the residue left in the tray after the com- 
bustions, a method necessitated by the small quantity of mate- 
rial available. The duplicate VII shows the possibility of 
a mechanical loss, An error of 1 per cent in the silver found 
makes but a small difference in the atomic ratio between the 
silver and carbon, since the atomic weight of the former is high. 
he sulphur was precipitated as barium sulphate, and the 
nitrogen as ammonium platinic chloride, after separating the 
irying over oil of vitriol or caustic potash. A drop of sulphu- 
ric acid on a watch glass in the potash desiccator showed that 
i Th 
anterior half was red hot; 0-438 gram was next put into water for 
{ 
4 
_ the nitrogen estimation, and finally 0533 gram of crystals, which — 
