grow pretty warm. Whence it undoubtedly follows, that 
it agrees with oyl of Vitriol in point of Acidum. 
He conciudes, charging his adverfary that he fays. 
Vegetables yield no Acidum j but gives an experiment to 
prove the contrary, vt^. that the 5«/ -^/%/^, and Sal i;- 
rinefum of Plants, by a well proportioned quantity, may 
be brought to a SJ JSitrum. Item ex f ale Tart ari, or 
Abjmthiz by a meer addition of fand, a Spintus Salts 
may be diftilled. 
Dv.Vot^bt Ux.K^nkels opponent,proceeds to the J^egnum 
Minerale , and abfolutely denys an heat, flame, or 
light, to be properly inherent in any Aczd, but that 
fome central oyls not eafily feparated from mineral yf- 
eids, do produce thofe incalefcent effects. He inftances 
in Okum Vitrtoli, Tartari per Deliquium : as alfo in 
Spritur Nitri 6c Vitriolic which derive much heat by mix- 
ture, from a latent oyl, and not from the apparent ex- 
ternal Actdum. He gives an experiment, how. Oleum 
»Sa//'ter^jr may be made inflammable, viT^, by difl:iiling a 
high tindure of Oleum TerebinthiTus made with common 
brimftone,for you may by diftiUation recover your Oleum 
TerebinthiTK^y and leave m the bottom of the Retort, an 
inflammable oyl of Sulphur. 
Rain water, he fays, affords oyl , and volatile lalt, 
but no inflammable Acid. 
He fays all Acida tho' never fo pure, if evaporated or 
difl:illed off, will always leave in the bottom of the 
Retort, or other Veffel a Materia pinguis & unUuofa^ out> 
©f which an inflammable oyl may be brought. 
He concludes faying, that it lufEces to prove, that 
^idifj does in no wife difpofe a body to inflammability, 
hcc^ule Oleaexprejfa do burn and flame more 
readily, when they are purged ot all mixture of ^t'/^^^v : 
^sOleum Lini,Terebintbt7i(e, Anil^y Fceniculi^ when diftilled 
per Ctneres, and other Alcalia that detain the Acida. 
Mr^ K^n\d in his anfwer deny^, that in thefe Mine- 
K 3 ral 
