[ ^6I ] 



Se&ion "jtb. 



MuRiATED Silver. 



It is now well known from the experiments of MargrafF, Berg- 

 man, Klaproth, Wolfe, Wenzel, &c. to which I need not add my 

 own, that loo grains of muriated filver contain very nearly 75 of 

 filver when dried in a heat of So*^, or 75,235 when heated more 

 but not fufed, as in Wenzel's and Wolfe's experiments ; but it muft 

 not be inferred that the remaining 25 grains are mere marine acid, 

 for filver diflblved in nitrous acid lakes up 10,8 per cent, of oxygen ; 

 therefore 75 grains of it take up 8,1, which fubftradled from 25, 

 leaves the quantity of acid 16,9; or if the muriated filver were 

 much heated, the acid and oxygen would amount only to 24,76; , 

 and deducing the oxygen, the acid fingly would be 16,6 grains ; • 

 this agrees exadly with Wolfe's experiment, for he found as al- - 

 ready faid that 120 grains of this metallic fait decompofed by tar- 

 tarin afford 55 of muriated tartarin. Now 120 grains contain by 

 this computation 19,92 of real acid; and as 100 grains muriated 

 tartarin contain 36 of real acid, 55 grains of it fhould contain 

 19,8; the difference is infignificant. 



Hence joo grains filver take up 22,133 of real marine acid, 

 and afford 133 of muriated filver by the addition of oxygen. 



And 100 grains real marine acid unite to 451,87 of filver, and 

 afford 602,4 of muriated filver. . 



100 



