PHYSIOLOGICAL REMAINS. 203 



separating of the pure metal from the ore or dross, 

 which we call refining. The second is, the drawing 

 one metal or mineral out of another, which we call 

 extracting. The third is, the separating of any 

 metal into its original or &quot; materia prim a,&quot; or ele 

 ment, or call them what you will ; which work we 

 will call principiation. 



1. For refining, we are to inquire of it according 

 to the several metals ; as gold, silver, etc. Inciden 

 tally we are to inquire of the first stone, or ore, or 

 spar, or marcasite of metals severally, and what kind 

 of bodies they are, and of the degrees of richness. 

 Also we are to inquire of the means of separating, 

 whether by fire, parting waters, or otherwise. Also 

 for the manner of refining, you are to see how you 

 can multiply the heat, or hasten the opening, and so 

 save the charge in the fining. 



The means of this in three manners ; that is to 

 say, in the blast of the fire ; in the manner of the 

 furnace, to multiply heat by union and reflexion ; 

 and by some additament, or medicines which will 

 help the bodies to open them the sooner. 



Note, the quickning of the blast, and the multi 

 plying of the heat in the furnace, may be the same 

 for all rretals ; but the additaments must be several, 

 according to the nature of the metals. Note again, 

 that if you think that multiplying of the additaments 

 in the same proportion that you multiply the ore, 

 the work will follow, you may be deceived : for 

 quantity in the passive will add more resistance, than 

 the same quantity in the active will add force. 



