article of inquiry concern mineral the second letter of the cross-row touch  the separation of metal and mineral separation be of three sort the first be  the separate of the pure metal from the over or dross which we call refine the  second be the draw one metal or mineral out of another which we call extract  the three be the separate of any metal into his original or means prima or  element or call they what you will which work we will call principiation for  refine we be to inquire of it accord to the several metal as gold silver c  incidently we be to inquire of the first stone or over or marcasite of metal  several and what kind of body they be and of the degree of richness also we be  to inquire of the mean of separate whether by fire part water or otherwise  also for the manner of refine you be to see how you can multiply the heat or  hasten the open and so save charge in the fine the mean of this in three  manner that be to say in the blast of the fire in the manner of the furnace to  multiply heat by union and reflection and by some additament or medicine which  will help the body to open they the soon note the quicken of the blast and the  multiply of the heat in the furnace may be the same for all metal but the  Additaments must be several accord to the nature of the metal note again that  if you think that the multiply of the Additaments in the same proportion that  you multiply the over the work will follow you may be deceive for quantity in  the passive will add more resistance than the same quantity in the active will  add force for extract you be to inquire what metal contain other and likewise  what not as lead silver copper silver c note although the charge of extraction  shall exceed the worth yet that be not the matter for at least it will  discover nature and possibility the other may be think on afterward we be  likewise to inquire what the difference be of those metal which contain more  or less other metal and how that agree with the poorness or richness of the  metal or over in themselves as the lead that contain most silver be account to  be more brittle and yet otherwise poor in it self for principiation I can  affirm whether there be any such thing or not and I think the chemist make too  much ado about it but howsoever it be be it solution or extraction or a kind  of conversion by the fire it be diligent to be inquire what salt sulphur  vitriol Mercury or the like simple body be to be find in the several metal and  in what quantity