C 446 ) 
moft alldeftroyedof itfelf in the fpace of twenty four hours, 
infomuch that in the Redpienc 5 twenty four hours after that the e- 
buUition had been there made, there was not found much more Air 
than there was before the fame was made. 
One day we mingled equal parts of Aqua, fortis and Ao[ua vita^ 
and having put two equal quantities of this mixture in tv\o fmall 
GlafTes with two equal bits of Iron^ one into each; one of thefe 
Glaffes was included in vacm. Then there was feen a very great E- 
buliition, and the liquor became black, whilft that was left rvtthouf 
the Recipient wrought almoft nothing,but remained alwaies tranf- 
parent, and rather white than black. After thefe two GlafTes had 
thus ftood tw^elve hours,that: which was in vacuo was taken out^and 
found,tbat the Iron was almofl: all difTolved, whereas the other was 
very little dimlnifhed. This Experiment fucceeds quite contrary 
when 'cis made with Aqua fortis alone and Copfer ; for then the dif- 
fclurion is lefs rvithin the vacuum^ than rvithout it. 
We made feme other mixtures of divers liquor?, which make no 
ebullition at all in vacuo , no more than they do irt the open Air. 
Oylof 0//wi makes none neither ^\i\\Vinegar, nor with Spirit of 
Wine d^i the infiant that they- are mingled ^ neither doth thefaid 
Oyl mortifie the Spirit of Wine. Only this we obferved oneday , 
that having mingled together, without iht Recipient, fomeof that 
Oyl and fimgar and Spirit of Wine^ and put this mixture in vacuo^ 
it did not boyl up fo foon as when there was no O7/ ; but then the 
bubbles which it made afterwards were bigger, and they began to 
appear again from time to time , fo that fomeof them were feen a 
quarter of an hour after the Recipient had been evacuated. Pofll- 
bly thismay cometopafs, becaufe that the Oyl, fwimmingon the 
top, retains the more volati! parts of the Spirit of If^/;;<f,which elfe 
would flie away as foon as the Air is begun to be pump'd out, and 
at the fame time it hinders the furface of the liquor below from ea- 
fily rifing up into bubbles, becaufe, to make them do fo, the parts 
of the Oyl that (tick clofe to one another, muft be feparated.When 
therefore the volatil parts are gather'd together in a fufficient 
quantity, able to furnount the refiflance which the Oyl makes to 
ir, they iflTue out with much more violence, than if nothing had re- 
tained them. 
All thefe Ebullitions, hitherto fpoken of, are greater in T'/i^/^i? 
than in the open Air : But with Lime it is not fo. For, taking two 
equal Glaffes with two equal quantities of Water, and putting the 
one 
