(212; 
tried by mixing a little Quickfilver with well-grouiid Copperas 
and Water ; whereupon he flaall in a trice fee all the Quickfilver 
diflblved and loft, efpecially putting a littleSalt to that compofiti- 
on. How this, and other like inconveniences are found out, and 
howeafily they may be remedied, may be feen in this Chapter at 
large. 
T\\tjixth^fev€nth^zx\(ii ^/^^//^ Chapters, treat of the GrindingznA 
Burning of Ore, and the damage that rtfults from this Burnings In 
the bufinefs of Grmding^ 'tis beneficial to grind the lumps over a- 
gain, and to grind them very fraall; To which prafiife our Author 
adds another way of preparation, ^iz>. by Boy ling, held by him 
more proper in all refinings by Quickfilver. As for Burnings that 
is ufeful, not only, that the Ore may grind the better ,but alfo that 
it may be better difpos'd for the Quickfilver to lay hold on, and in- 
corporate it felf with the Silver it contains : which burning yet is 
not to be ufed in Ores that are mixt with Copperas, the mortal ene- 
my to Quickfilver ; the fire not only vanquifliing, but on the con- 
trary increafing that fubftance^ of which therefore alIOre,where- 
with 'tis mixed, is firft to be clear'd by well wafiiing it. 
- The nwth delivers feveral Experiments^ proving the damages 
she Burning of Ore^ if they be not knorvn and remedied.And the tenth 
examines. Whether the Ore ought to be burnt in the Stone ^ or in the 
Meal 5 as the ^/^'W/^Aafllgns the Materials to be mixed wth Ore 
vphen 'tis burnt I Where OGcafion is taken to reprefent , that the 
Difeafesof Oremay be known by putting a little of it, ground 
fomewhat grofs, upon a red-hot plate of Iron, obfervingwell what 
fume it makes; which if it be white or black, it participates of 
Bitumsof that colour 5 if yellow, of Orpiment ; if red, of San- 
daraca , if yellow in the middle and green on the outfides, of Sul- 
phur, c^r. 
The tmlfth and thirteenth teach the Refiner what he is to do be- 
fore he incorporates the f Caxon far refining; 
fJ/]fVrysrtf^ Where alfo are fet down the Signs, fliewing, when 
the feveral Ores, diverfly mixed and handled ac- 
cordingly, are difcharged either of a'l their Sul- 
phur and Antimony ,or of their Bitum, and the like . as a f), when 
an Ore is well difpofed for the Quickfilver, and when nor, (^c. 
fourteenth and fifteenth confider the nMure of ^mckjilver , 
mdthe Caufes and Differences of the Refiners Lis ojf ^uick^lver^zs 
*tis caird, whicli is Quickfilver divided into very fubtile parts, 
whichdivifioniscaufedby theofcenpafllngofit through the Ore 
although 
