uefs o£ But this it did by means of a fing^lar Inftr umentjb? 
him call'd a PhihfophmlMill^whok ftrudure is thus defcribed, 
Tab.i. A* J Leaden Head pretty tUch^ fame^ which is fquare, 
^'2- B. the Axis. c. d. Here both the Pefiles an 
C. An indented Drum^ affixed to the Axis, 
V). A J)ruTn €m[iBwgof Coggs, e. Here the Pefiles are'fireng: 
A Mortar^ j themd by a (Irong Brajs-^ 
F. Pefiles, i ring. 
G. A Handle^ by which th^Millf. Here both Pefiles arefireng. 
is turn d. \ therid by two Brajs-cafes. 
a. The Superior part of theg. Both the thic\ pefiks gf 
Axis^ which is roufsd. | glafs. 
h. The Inferior part of the 
Follows the Operation it felf 
Put Leaf Gold^ as much as you pleafe^ cut very /mail, into 
a very thick Glafs; mortar, or into one of Gold, (fuch an one 
as the late King of Denmar\^ a little before his deathjCaufed to 
be madefor this operation :) In this Mortar^ covered only 
with paper^left any duft or other thing fliould fall in, grind the 
faidgold night and day by an uninterrupted agitation of the 
Mill, till you fee it reduced into a duskilh colour. For which 
grinding there are commonly to be allowed 14 days and nights, 
But if you will only work by day, there will need a whole 
moneth. This done, put the powder into a Retort, not very 
deep,butfliall0w,fuch as theEngliih ones ufe tobe^and drive it 
by a fire of fand by degrees^but at laft by a very ftroog one^Sc 
there will come over a few but very red dropsjwhich being di-- 
gefted either or with Tartarifed Spirit of Wine, give you 
^xvuQ Aurumpotabile^ which is fincere, and un-imbued with 
any forrain quahty. 
The Remainder though they could alfo havc^afily refolv'd 
by Grinding ; yet they thought good to make an Extrad of it 
by means of their Philofophical ^^r^/'tt;??, made oiVerdigreafe^ 
Sulphur, and a highly redificd Spirit of Wine, by along digc- 
ftion t Whereby they got again a Tinfture fufficiently red and 
of very great virtue. And that little that remained, which 
was but verylitt V they reduced into abody by the means of 
Borax j but it wanted its due weight, 
- 'Tis 
