396 PHYSIOLOGICAL REMAINS. 



What compounds will be made of metal with stone 

 and other fossils ; as latten is made with brass and the 

 calaminar stone ; as all the metals incorporate with 

 vitriol ; all with iron powdered ; all with flint, &c. 



Some few of these would be enquired of, to disclose 

 the nature of the rest. 



Whether metals or other fossils will incorporate with 

 molten glass, and what body it makes ? 



The quantity in the mixture would be well con- 

 sidered ; for some small quantity perhaps will incor- 

 porate, as in the allays of gold and silver coin. 



Upon the compound body, three things are chiefly to 

 be observed ; the colour ; the fragility or pliantness ; 

 the volatility or fixation, compared with the simple 

 bodies. 



For present use or profit, this is the rule : consider 

 the price of the two simple bodies ; consider again the 

 dignity of the one above the other in use ; then see if 

 you can make a compound that will save more in price 

 than it will lose in dignity of the use. 



As for example ; consider the price of brass-ord- 

 nance ; consider again the price of iron-ordnance, and 

 then consider wherein the brass-ordnance doth excel 

 the iron-ordnance in use ; then if you can make a com- 

 pound of brass and iron that will be near as good in 

 use, and much cheaper in price, then there is profit both 

 to the private and the commonwealth. So of gold and 

 silver, the price is double of twelve : the dignity of gold 

 above silver is not much, the splendour is alike, and 

 more pleasing to some eyes, as in cloth of silver, sil- 

 vered rapiers, &c. The main dignity is, that gold bears 

 the fire, which silver doth not : but that is an excel- 

 lency in nature, but it is nothing at all in use ; for any 



