204 PHYSIOLOGICAL REMAINS. 



2. For extracting, you are to inquire what metals 

 contain others, and likewise what not ; as lead, silver ; 

 copper, silver, etc. 



Note, although the charge of extraction should 

 exceed the worth, yet that is not the matter : for at 

 least it will discover nature and possibility, the other 

 may be thought on afterwards. 



We are likewise to inquire, what the differences 

 are of those metals which contain more or less other 

 metals, and how that agrees with the poorness or 

 richness of the metals or ore in themselves. As the 

 lead that contains most silver is accounted to be more 

 brittle, and yet otherwise poorer in itself. 



3. For principiation, I cannot affirm whether 

 there be any such thing or not ; and I think the che 

 mists make too much ado about it : but howsoever it 

 be, be it solution or extraction, or a kind of conver 

 sion by the fire ; it is diligently to be inquired what 

 salts, sulphur, vitriol, mercury, or the like simple 

 bodies are to be found in the several metals, and in 

 what quantity. 



Dr. MevereCs answers to the foregoing questions, touch 

 ing the separations of metals and minerals. 



1. For the means of separating. After that the 

 ore is washed, or cleansed from the earth, there is 

 nothing simply necessary, save only a wind furnace 

 well framed, narrow above and at the hearth, in shape 

 oval, sufficiently fed with charcoal and ore, in con 

 venient proportions. 



For additions in this first separation, I have ob- 



