3^o ESSAYS AND OBSERVATIONS 



cither rife to the top, or fwim about in 

 the liquor for a while, till, difcharging 

 many bubbles of air, they grow heavier, 

 and fall down in form of a white powder: 

 The filver being in this manner feparated 

 from the liquor, then wafhed and dried, 

 is nearly of the fame weight with the fil- 

 ver difTolved j and, when melted, runs 

 into a lump of pure malleable lilver, 

 without any conliderable lofs. 



If an alcaline liquor, Asfpir.JaL am-^ 

 moniaci, or ol. tartari p, d, is dropt into a 

 folution of filver, it excites a ftrong ef- 

 fervefcence, which will be renewed when 

 more of the alcalme liquor is dropt in at 

 intervals, until the acid is fatiated ; and 

 there appears a white, bulky, and frothy 

 matter, which gradually fubfides : All 

 being thrown into a cap of brown paper, 

 fitted to a funnel, and warm water pour- 

 ed in, the frothy matter diminifhes con- 

 fiderably in bulk ; and there is left a pow- 

 der of an afh colour, which, being dried, 

 a little exceeds the weight of" the filver 

 difTolved. 



The 



