( S054 ) 
ceeded thus j He took of crude Tartarj 2, 3 or more pounds 
(according to pleafure) and firft calcined it fl ghily and only 
to forae blacknefsj to have, what is moft neceflary, a ferment 
to ferment the Tartar with. Having put this into a large por^ 
he poured on it forauch water, that it flood an inch high a- 
bove it : Then he gave ir at fi ft a gentle fire to make it hike- 
warm y which donej he powred into it half a handful of finely 
pulverifedTartarjand fliortly after (aw feme bubbles afife,thac 
increafed more and more. Which perceiving he continued 
as he had begun^ at feveral times to poure in more powder of 
Tartar, whereby the fermentation was raifed and quickned, 
the bubbles thereupon rifing in fo regular an order, as if they 
had been natural grapes; the colour excepted* But here he 
was to keep a very exa<£l regiment of the Fire^ fuch as all Fer- 
mentation requireth 5 and took care alio, leaftby a too copi- 
ous affufion of the faid powder the Ebullition fliould grow too 
vehementj and the pot run over . The fermentation ceafing, 
he put all that was in the pot into an IronBolt^head'^a Glafs one 
being in danger to be brokeD5)to which he often apply*d a wet 
linnen cloathj thereby to hinde? a too great boyling up of the 
fermented Tartar^ which elfe will fuddenly runup, and pafs 
into the Recipient it felf. Wherefore the fire is alfo very care-- 
fully to be govern'd^ and increased by little and little ; though 
at laft it muft be ftrong, to force up all the Salt. Which be* 
ing obferv'd by him, he found the grofs and feculent Tartar by 
the faid Fermentation fo volatilized^that there remained nota- 
cy fixt fait in the Caput mortuum^ Which he faith he hath expe- 
rieoced more than once. He addsj that the liquor obtained 
from th^ocC;, having much water in it, added for the fake of 
the fermentation, is alfo to be much rectified, and that fo far, 
till it appear whitifli *, which fhews that it holds a due quantity 
of Volatil Salt. Which Sale, of what value it is, this Author 
would have us eftimate from the tefliraony of Van Helmout^ c, 
I'y^ de Feb^p.m.jQo. and from the wonderful virtue^ himfelf \ 
laith to have found io it^ both in internal and external affecti- 1 
ons of the body, and even in Gangreens themfelves ; befides 
that by means thereof he hath prepared feme efTences, which 
in vain l e had tried to make by olhtx Menfiruumu 
Another inftabcx^he gives us of the great ufe oi Fermentation 
h'j^^eparating impure and ncxiomS tilphurs: which he piefcribeth to 
try 
