a a ©f tlje g£ec$antcal Dtfgtne of 



we had been oblig'd to employ but , 

 after the rate of twelve drops of the 

 latter Liquor to an ounce of the for- 

 mer 5 fo Jthat, fuppofing each of thefe 

 drops to weigh a grain , the fortieth 

 part of Spirit of Nitre being added, 

 ferved to turn the Spirit of Salt into 

 a kind of Aqua Regia. But to know 

 the proportion otherwife than by 

 ghefs 5 we weigh'd fix other drops of 

 the fame Spirit of Salt , and found 

 them to amount not fully to three 

 grains and an half: Whence it ap- 

 peared , that we added but about a 

 feventieth part of the Nitrous Spirit 

 to that of Salt. 



• The Experiments that have been 

 hitherto recited, relate chiefly to the 

 produftion of Corrofive Menftru- 

 um$ 3 and therefore I (hall now adde 

 an account of a couple of Trials* 

 that I made manifeftly to leflibn ot 

 quite to deftroy Corrofivenefs in 

 Liquors very cbnfpicuous for that 

 quality. ; 



EX- 



