ee nn. 
Lea. IV. 261 
A 
DISCOURSE 
Concerning the 
ESSENTIAL and MARINE 
unt 
‘en 
“ Salts of Plant 
alts O ants. 
Read before the Royal Society, December 21. 
1676. 
in CHAR L 
In which is fbewed the way of making both an ESS E N- 
TIAL and a MARINE Salt, out of the LIXI- 
VIAL Salt of a Plant. 
O ME TIME fince, I took the boldnefs to pre- 
fent my thoughts to this Honourable and Learned 
En Body in a Difcourfe concerning Mixture. Wherein 
I have endeavoured to lay fuch a Foundation, as 
might hereafter reduce the Doffrine hereofto Ex- 
perienceand Praéfifés and to demonftrate,the Power 
and Uf of Artificial Mixture. And in farther proof 
of what is therein afferted, I have fince made a continuation of Expe- 
riments upon the fame Subject, in Two Methods. One in the Mix- 
ture of feveral Menftruams, both Acid and Alkaline, with all Sorts of 
Bodies, ‘The Other, by calcining them, or, as it were, mixing them 
with the Fire. 
2. $. Ifhallnow proceed toa Third, which is, the mixing them 
4 with the Aer orexpofing them to it ; another of Natures grand Mex- 
firunms5 which goes fometimes further than the Fire it fell, in the dif 
{olution 
