f HYSIGAL AND LITERARY. 33^; 



jrials, without the addition of quick-filver, 

 properly treated, yield a good aqita rcgia 

 .which diffolves gold : Or quick-filver is 

 firft diffolved in aqua fort'u^ the folutiqii 

 is evaporated till there remains a white. 

 jdry, vitriolic body, which is to be mixed 

 and rubbed with an equal weight of de- 

 crepitate fea fait, and fublimed as before: 

 Here likewife the acid of fea fait, with 

 a portion of the nitrous, is joined to the 

 , mercury J for, one.jvay of preparing an 

 aqua regia^ is by pouring aqua fortis upon 

 decrepitate fea fait, and drawing off a li- 

 quor by diflillation, which is in efFedl 

 done in this cafe ; only the acid incorpo- 

 rates with the quick filyer into a vitriolic 



form, 



i 



VIII. The folvent powers of certain 

 inenjlnia are not deflroyed in the acl of 

 folution, but can be exerted on other bo^ 

 dies ; and the menjirua^ feparated from the 

 diffolved bodies, may retain or recover all 

 jtheir former qualities.* 



Tijis property of feveral folvents will 

 |be found to obtain in many more inftan- 

 ps than is commonly imagined. Many 



folvents, 



