( 3^0 ) 
A Solution of corrofive Sublimate was made inWater, 
ten Drops of which, mixed with the feveral Solutions, 
produced little or no Alteration but upon dropping in 
the 0/. Tartari per deliq, the following Appearances 
were produc’d : In the Solution of the Epfom Salt, fe- 
cond hemington Salt, and fecond 'NewcaJUe Salt, the 
Precipitations were red ^ in the Solution of the com- 
mon Salt, and firft NewcaJHe Salt, the Precipitations 
were white 5 in the Solution of the firft Lemington^'Ax.^ 
the Particles precipitated approach’d pretty near the 
Colour of the three hrft. 
I took fome of thefe feveral Salts in Subftance, and 
to each of them pour’d a little 0/. VttrioL which is one 
of the Experiments Dr. Grew try’d upon his Salt, and 
which he fays caufes a moderate Ebullition, whereby 
it appears to partake of an alkaline Principle ; But 
without looking for this alkaline Principle from its fer- 
menting with an Acid, (Terms juftly exploded by the 
learned Dr. Freind in his PraleSriones 1 am 
inclin’d to believe, that the Salt he try’d the Experi- 
ment on, had not, according to his own Diredions, 
been thoroughly feparated from his muriatick Salt, 
For this Oil pour’d on the Epfom Salt, fecond Leming- 
ton Salt, and fecond Nevpcajile Salt, produc’d no fenh- 
ble Fermentation. On the Sea Salt it ads with Vio- 
lence, forcing off its acid Spirit with an infufferable 
Qas, The fame Elfed in proportion it had on the firji 
hemington Salt, and firfl NewcaJUe Salt ^ none at all 
on the Sal Mirabile, as being a Sea Salt already fatia- 
ted with the Oil. 
What I have all along call’d the third Salt, anfwers in 
mod of thefe Experiments to the Sea Salt, and yet has 
fome Properties exceedingly different from it ^ to thofe I 
have mention’d thefe may be added j k will not de- 
crepitate 
I 
