56 M tfce ^ec&amcal flDtfgme 



may be illuftrated by what happens* 

 when Sal Armoniac is well ground 

 with Lapis Calaminaris or with (bme 

 fix'd Alkali^ and then committed to 

 diftillation : For the Sea-falt 5 that 

 enters the Composition of the Sal 

 Armoniac ^ being detained by the 

 ftone or the Alkali^ there is a divorce 

 made between the common Salt and 

 the urinous and fuliginous Salts, that 

 were incorporated with it, and being 

 now difingaged from it, are eafily e- 

 levated. I elfewhere mention, that 

 I have obferved in Man's Urine a 

 kind of native Sal Armoniac, much 

 lefs Volatile than the fugitive that is 

 fublim'd from Man's Bloody Hartf- 

 horn, &c. and therefore fuppofing, 

 that a feparation of parts may be 

 made by an Alkali, as well in this Salt 

 as in the common fa&itious Sal Ar- 

 moniac 5 I put to frefh Urine a con- 

 venient proportion (which was a 

 plentifull one) of Salt of Pot-a(hes 

 (that being then at hand) and diftil- 

 ling the Liquor it yielded-, accor- 

 ding to expectation;, a Spirit more Vo- 

 [ i latile 



