3^4 ESSAYS AND OBSERVATIONS 



fal-ammoniac, until the fait is diflblved 

 and fatiated by the acid. This neutral 

 faline liquor, however, will not chryftal- 

 lize or coalefce into a dry folid fiilt, nor 

 will the volatile alcali feparate from the 

 acid, by a fimple diflillation, but they 

 rife together. I put eight ounces of this 

 fpirit into a bolt head; ar.d, adding half 

 an ounce of dry fait of tartar, I prefently 

 fitted a capital and receiver to the body, 

 luted the joinings, and fet the veflcls in 

 a fand heat ; in a little time a white vo- 

 latile fait fublimed into the capital, which 

 was foon wafhed down by a watery va- 

 pour into the receiver. This liquor being 

 tried, was found equally ftrong, pungent, 

 clear, and volatile, as the beft fpirit of fal- 

 ammoniac : The faline matter left in the 

 body was of a greyifli colour, foft and 

 greafy to the touch, and would hardly 

 dry or chryftallize, refembling tartarus^ 

 regeneratiis. 



I need not confirm this by any further, 

 experiment ; becaufe it is known to every 

 body, that the volatile fait and fpirit of 

 fal ammoniac are procured by adding a 



fixed 



