1820.] of different inorganic Bodies. 9,'; 



acid* as long as any precipitate fell. I immediately evaporated 

 it to dryness, and as towards the end the two acids destroy each 

 other, so that a little nitrate of silver might be again formed, 1 

 poured water on the dry mass, added muriatic acid, and evapo- 

 rated the whole to dryness a second time. The phial with its 

 contents was then exposed to a spirit of wine lamp till the muriate 

 of silver Avas entirely melted : 2U grammes of silver treated in 

 this manner gave in two experiments 26"556 and 26-558 grammes 

 of fused muriate of silver, equivalent to 132'78 and 132-79 of 

 miu-iate from 100 of silver. 



Though the acids employed in these experiments were as pure 

 as they can be obtained by the best known methods of preparing 

 them, they always left visible traces, when evaporated, on a 

 watch-glass. But, as in these experiments, it hud been neces- 

 sary to add these acids in cojisiderable quantities, it is obvious 

 that the small quantity of foieign matter which they contained 

 must have acted on the l)alance, and rendered the weight a little 

 greater than it would have otherwise been. As the true point 

 must lie between 132-7 and 132-79, I think we may adopt 

 132-75 as sufficiently near the truth, observing always that the 

 uncertaiuly in the results exists only in the ten-thousandth parts, 

 which constitute the ordinary limit beyond which I have not 

 been able to carry analytical experiments. 



Admitting that 100 of oxymuriate of potash give 39-15 of 

 oxygen ; that 100 of muriate of potash give 192-4 of muriate of 

 silver; and that 100 of silver give 132-75 of muriate of silver ; 

 we may conclude from these three data by a calculation too 

 simple to render it necessary to give an account of it here, the 

 composition of the following bodies : 



Muriate of potash is composed of 



Muriatic acid 36-743 100-000 



Potash 63-257 174-882 



Potash is composed of 



Potassium 83-0484 100-000 



Oxygen 16-9516 20-412 



Oxide of silver is composed of 



Silver 93-112 100-0000 



Oxygen 6-888 7-3986 



Muriate of silver is composed of 



Muriatic acid 19-0966 100-000 



Oxide of silver . . . 80-9034 423-653 



The capacity of satio^ation (f muriatic acid, that is to say, the 



♦ This acid had beon jiropared by satnr.itina; water willi muriatic acid gas, 

 ^bicli bad pussrd Ibrougli an interinciliate votipl to deposit ull impurity. 



