Dr. Kane on the Compounds of Ammonia. 5 



The liquors remaining contained a trace of mercury, which precipitated gave 

 0.220 of ng. s. Therefore 100 of sulphate of mercury gave 



Ammonia-turpeth = 79-31 



Sulphate of barytes = 58.91 



•.• Sulphuric acid = 20.245 



And sulphuret of mercury = 2.10 equivalent to 1.81 of mer- 

 cury, giving 1.96 oxide and 2.68 sulphate. 



There had therefore been decomposed 100 — 2.68 of the sulphate, and 100 of 

 sulphate completely converted into ammonia-turpeth should give 



Ammonia-turpeth = 81.48 

 Sulphuric acid = 20.06 



The sulphuric acid in 100 of Hgo. SO3 is 26.82, of which 20.06 is almost 

 exactly three-fourths, for | . 26.82 = 20.115. Therefore in the ammonia-tur- 

 peth is contained all the mercury and one-fourth of the sulphuric acid ; its com- 

 position therefore comes out. 



Mercury = 67.83 



Sulphuric acid = 6.76 

 Other matters =: 6.89 



83.25 j 

 81.48, or 8.29 [ 100.00 

 8.46 J 



C. 7.317 grammes of ammonia-turpeth were diffused through water, and 

 decomposed by a current of sulphuretted hydrogen. The sulphuret of mercury 

 was collected on a filter, and dried carefully, until it ceased to lose weight. 



Filter and sulphuret = 7.422 \ ^ ^^j^ 

 Filter = 0.355 / ' ' 



Sulphuret = 96.58 per cent., containing 83.35 mercury. 



The clear liquor reacted neutral ; it was evaporated in a water-bath to per- 

 fect dryness, and the capsule, with the residual sulphate of ammonia, carefully 

 weighed ; the salt then cleared out without loss, and the capsule tared ; the salt 

 was then again weighed on the tared slip of paper, on which it had been col- 

 lected, and the second not differing from the first weighing by a milligramme, 

 certainty of accuracy was obtained. 



The sulphate of ammonia weighed 0.988 gramme, corresponding to 13.5 per 

 cent., and consisting of 



