The Firft is of Silver Oars^ where after a l>rief icinumera- 
tiOn of the particular matter handled in i6 He divides the 
Oars according to thcfe differences which are n^loft to be 
regarded by the Mmer-^ vi^. They zvQGhhGrEafy^ming 
Oars, 01 Hard'ft(rwing02ixs. Of the firft fort are reckoned 
^lajS'Oars » which loofe nor above one fixth part in the 
Fire ^ The White^gpldiJhOars» fb called not from their con- 
tents, but from their goodnefs in • Horny-Oars, na- 
med from their tranfparency ; and l^ed-goldijh-Oars like 
Cinnabar^ which yield above half Silver v with many more, 
which are defcribed by their fenfible qualities, and are 
computed to yield from fix to ten Ounces in z Centner, or 
hundred weight. 
Hard-flowing Oars are all Flinty-Oars which are common- 
ly rich in Copper^ but yield very little Stiver^ net much more 
than half an Ounce in a Centner. Likewife all common 
White^Glimneer^ or Wolferan, cr Sparging- Oars, TalJ^ or 
Cat-Silver zxe very poor. 
Next follows a defcription of the ^Jfay-Furnaces, and 
all the Inftruments neceffary to the preparation:, and prov- 
ing of Silver* andother Metals j as Aduffles, Bottowplates^ 
Ttfisi Copels^ Sec. All which, as to the fhapes which the 
Antients did* and the moderns do, ule** as alfo the mat- 
ter out of \yhich, and the manner by which they are made > 
are accurately taught,, and commended ordifcommended* 
as they anfwered Experience. 
For good Copels on which the Tryals will neither leap, 
norfparkle, He particularly commends iC^^^4^^'^^^^ afhes, 
either from Sheep* or Calf perfe£tly calcin'd, very finely 
powdered* and moiftned with ftrong Beer. 
The matter for the making Copels He calls Clar , for 
which* after the Trya) of other ^ones both of Beafts 
and Fifli , He prefers Calves- head-Bones , or the Scales that 
come from their fore -heads asthebeft. 
Thenucceeds the preparation of im^-G/i^j, or i^/a/r ; 
(which is a general term for any addition thiit makes the 
Metal 
