430 Prof. Kane on the Powder formed by 



Exp. Yellow powder. Chlorine in liquor. 



1 90-00 5-93 



2 88*50 6-50 



3 90*30 6-40 



mean 89*60 6-29. 



But 100 of white precipitate contain 



Mercury 78'60 



Chlorine 13-85 



Therefore 89*60 of the yellow powder contain 



Mercury 78*60 



Chlorine 7 56 



and 100 contain 



Mercury 87*95 



Chlorine 8-44. 



C. — 100 grains of white precipitate were boiled with water 

 until completely decomposed; the resulting yellow powder 

 weighed 91*15 grains. The liquor was cautiously evaporated 

 to dryness, and gave 10*23 of sal-ammoniac, consisting of 



Chlorine 6*76^ 



Hydrogen *19>10*23. 



Ammonia 3*28j 



Therefore there are obtained, by this experiment, for the con- 

 stituents of yellow powder, 



Mercury 86*23 



Chlorine 7*77 



Ammonia 3*83. 



D. — It has been already stated, that when this powder is 

 heated, it is resolved into ammonia, azote, water, calomel, and 

 quicksilver. Having found that, by performing this operation 

 in a very small retort, the water and gases could be dissipated 

 without any remarkable loss of the other constituents, I made 

 some trials in this way to determine the amount of the chlo- 

 rine and quicksilver. For this purpose a higher temperature 

 is required than for the corresponding analysis of white pre- 

 cipitate, and the condensation of the mercurial vapour must 

 be very carefully effected. In other respects the manipula- 

 tion was the same, and the following table contains the re- 

 sults : 



p, Quantity of Sublimed Sublimed Residue 



P* Material. Residue. from 100 parts. 



1 14*30 13*37 93*50 



2 19*65 18-53 94*30 

 & 23*72 22-35 94*22 



Per cent, mean 94*01. 



