[ m 3 



SECT. VI. 



Mineralogy. 



And join both profit dnd delight in one*. 



1, HPHE manner of working mines, and the me- 



A thods employed in getting, breaking, and 

 extracting the ores; the tools and machines em- 

 ployed for each of thefe purpofes, are fubje&si 

 worthy of inquiry. Is gunpowder ever ufed td 

 blaft the {tones or ores ? The manner in whicfi 

 the ore or metal is found under ground, whether 

 in perpendicular veins, or in vicinity to them ; iri 

 horizontal flat ftrata, loofe pieces, or in folid 

 continued bodies ; in what kind of ftone, and at 

 what depth ; the means of carrying off the water 

 when prefent in the mines. The vapours found iri 

 them, whether mephitic and noxious, or inflam- 

 mable when fire or light comes in contact witH 

 them. 



2. The manner in which white copper, refem- 

 bling filver, is manufactured, and the various pro- 

 cefles whereby it is done. 



3. The operations ufed in extracting the me- 

 tals from the refpective ores, with fpecimens and 

 names of the ores, and the places where they are 



f Simul et juctfnda et idonea diccre vitsK 



H6R. 



procured ; 



