C2II) 
JL the Second Book of the ^ARt cfMEttALS, rpherein u tdugk 
the Common v^ay of Refining Silver by ^uiMlver^mth fome New 
Rules added for the better ferformmce of the fame : Written in 
Spm 'tjh by Alonfo Barba, and Englijht by the Right Honorable 
Edward Earl of SdiVidmchy London^ 1674. in 8^. 
THE firfl Book of this PjId jedi: wasdifcourfed of in the next 
foregoing Trad. This fecondcoxi(\iis of 24 Chapters^ moift of 
them praftica' ; whereof the two fir ft do inftruft the Reader, with 
what care md cmtion a Refiner of Mettals is to be employ ed\dii\d vphat 
knowkigz {ucb an one is tobe furniffi tV0ith ^ viz. that he is to know 
the quali :ies and differences of all fom of Mettals and Minerals, 
which of them are aioft proper for Qulckfilvenand which for melt- 
ing ; item, the Difeafes infefling Mettals, and the way of clearing 
them ^ as a! fo the Accidents of Quickfiiver, and the way of Refi- 
ning both in great and little ; and ab ove all, the manner how to 
make the leOTer EfiTay, by the fire, of Ore ground to powder before 
theMettal be incorporated cogether,thac fo he may certainly know, 
how much Silver (e^g.) is to be gotten ouc of the Ore of that Mer- 
tal .* The want of which kno wledge and care, om Author faith, hath 
cofi the Kingdom of Feru abundance of mony, and is ftill of grean 
prejudice to it ^ which he provetliby very confiderable EKperi-» 
mencs, whereby It was made evident, that a Vein of Mettal, efiayed 
by the Fire^ yielded 900 pieces of Eight the Quintal,which by the 
ordimry way of Quickfilver yielded but four or five : item, that 
another Mine, which by the common Effay with Mercury appear'd 
to havefcarce any Silver at all in it 5 yet by the other way col« 
tained 60 pieces of Eight the Quintal. 
The^^/ViChapt. tre^ts of ih^ knowledge of thofe above-intimated 
dijferencesof Mettals iTht fourth teacheih ihei^^y of for ting Ores^ 
and the proper manner of Refining each of them : Where 'tis made 
out, that to effay thatMettal by Quickfilver, which requires the 
fire, isto deftroy it j as 'tis to loofe the profis if that Metral be 
put in the furnace, which is not to run : Andfurther,though the fc« 
veral Ores be fit for the Quickfilver, and fome for Fire, yeceven 
herein they have their differences of being eafier or harder to be re- 
fined, according as they concur or differ in the remedy that is ne- 
cefTary to be ufed for that purpofe. 
The fifth Chapt. informs us. How to know the ill Qiialities th^Jt 
jnfeft the Ore, and how to purge them away; Where 'tis noted, 
thatfuch Ores, as partake o^ Copper as, \\W\ not endure Qiiickfilver, 
but confume and fcatter it which our Author faith may be eafiiy 
E e 2 tiied 
