( I JO ) 
ar another time, I fancy’d that I faw the. Watery part, ^ 
which lay upon or about thofe Salt Particles, impregnated 
with abundance of others much m’ore fmall than the 
former, which in the evaporating of the Water, were 
coagulated upon the firit mentionrd clear Salts, and fo> 
eclipfed the Ihining or glazinefs of thofe Salts. 
After fome Days, -having decanted the Water off 
the Whitifli Matter, and poured frefli upon it, I ob- 
ferved, that there were Salt Particles Ifill coagulating 
upon the Superficies of the Water; and thofe Salt Par-- 
ticles were exti*a£led from the Corral in fo unfpeaka- 
ble a Number, that no Body wou’d believe it unlefs he 
had the Experience of it. 
From hence we may conclude, that the hardnefs of 
the Corral proceeds from no. other Caufe but the great 
number of itis fix’d Salts. 
NoW'forafmuch as the Heat of the Fire was fufficient 
to take away the Rednefs of the Corral as foon as it was 
put into it, I laid three little Pieces of Corral on Aqua, 
fortisy to try whether that wou’d have the fame Effedf ; 
and I had no fooner poured the Aqua fortis upon the 
Corral, but the Air Bubbles, which came out of the faid 
Corral, took up four times the fpace the Aqua fortii had- 
filled before ; and tlte Corral, moreover, by Reafon of 
the great Multitude of Air Bubbles, that continually 
came out of it (fome of which alfo -Ruck upon was 
raifed from the Bottom to the Superficies of the Water, 
but the faid Water was not in the leaft tinged with the 
Reel Corral, but it became Whitifh' wiiich-was occafi- 
on’d by all thofe Parts feparated from the Corral ; and 
when the Aqiia fortis had no more power to dilfplve(^tlie 
Corral, by reafon that I had poured but a very little up- 
on it, the aforemention’d dilTolved Parts fubfided to the i 
Bottom, and the Superficies of th^ Aqua fortis refumed 
its firft clearnefs. . : * 
After I 
