In this place _Farnner_ teaches that Copper Ores are to be separated,
when, yet they are not separated but melted, that thence the Copper
may come forth, which Copper if it contains silver being mix’d with
a due weight of lead, it is separated: but Mines of copper are never
separated, which he does not understand, and so he betrays his
ignorance in these terms. This way of separating is sufficiently known,
and every where where copper mines are found, is wrought in abundance
and cannot be hid. He that possesseth Copper mines, will easily find
men that will thence elicite the copper, and afterwards separate it,
neither will any man need to go to _Farnner_ on that account. Indeed I
wonder at his extream impudence, that he was not afraid to promise that
he wou’d teach others so many Sciences, of which if he knew the half
part, his village wou’d not hold all the furnaces he wou’d need for the
demonstration of them.
Further, for these and the following Sciences, which yet; are the most
difficult and laborious of all, he requires no money, but for a certain
reward promises to demonstrate them all.