( *5 ) 
tile Oil, refembling the Oleum Philofophorum, which 
is Olive Oil diftilled from Brick-duft. Thirdly, 
The fix'd Acid enclofed in a very fubtile Acid. Near 
the End of the Diftillation comes over that depurated 
Oil which conftitutes the inflamable Part of the 
Phofphorus , which is not raifed up 'till the laft, and 
that by the Continuance of a very ftrong Reverbera- 
tory Fire. 
But an Operator that is not well exercifed in the De- 
grees of Fire, and doth not know how and when to 
take away thefe Oils apart, will have nothing but a 
volatile Salt, and fetid Oil, and get at laft only a 
little un&uous opaque Phojphorus\ fuch as the fa- 
mous Kunckel , Dr. Craf t , and Brand did, as they 
acknowledge in their YVritings j but not our hard 
tranfparent Glacial Phofphorus. Since Kunckel there- 
fore, and his Followers, were never able to make the 
true folid Glacial Phofphorus , it was abfurd for him 
to write, that he could make it even out of crude 
indigefted Things, in their natural State ; for 
either this famous Man fpoke too much at large, 
and had never tried the Experiments, or elfe lie 
muft defign to impofe upon the World : For I can 
boldly contradiQ: him in this Point from the feveral 
Experiments I have made, but never found any true 
I Phofphorus except in fuch things as had undergone 
Digeftion in Animals. And I know my felf to have 
been for thefe forty or fifty Years, that is, ever fince 
I left the Laboratory of fmy Malter the Honourable 
Mr. Boyle , the only Perfon in Europe able to 
make and produce in any Quantity the true folid 
phofphorus. 
I i I did 
