400 PHYSIOLOGICAL REMAINS. 



4. Bell-metal. Copper, a thousand pounds ; tin, from three 

 hundred to two hundred pounds ; brass, a hundred and fifty 

 pounds. 



5. Pot metal, copper and lead. 



6. White alchemy is made of pan-brass one pound, and 

 arsenicum three ounces. 



7. Red alchemy is made of copper and auripigmen. 



There be divers imperfect minerals, which will incor- 

 porate with the metals : being indeed metals inwardly, but 

 clothed with earths and stones : as pyritis, calami naris, my si, 

 chalcyti, sory, vitriolum. 



Metals incorporate not with glass, except they be brought 

 into the form of glass. 



Metals dissolved. The dissolution of gold and silver dis- 

 agree, so that in their mixture there is great ebullition, dark- 

 ness, and in the end a precipitation of a black powder. 



The mixture of gold and mercury agree. 



Gold agrees with iron. In a word, the dissolution of 

 mercury and iron agree with all the rest. 



Silver and copper disagree, and so do silver and lead. 

 Silver and tin agree. 



The second letter of the cross-row, touching the separation 

 of metals and minerals. 



SEPARATION is of three sorts ; the first, is the sep- 

 arating 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 his orig- 

 inal, or materia prima, or element, or call them what 

 you will ; which work we will call principiation. 



For refining, we are to enquire of it according to 

 the several metals ; as gold, silver, &c. Incidently we 



