t*d THE HISTORY OF CHEMISTRY, 



parent, but others that are opaque : as the jaf- 

 per, &c. : Whatever admits of being polifhed j 

 as marble, porphyrites, ophites, tophus, and 

 Hints: Various kinds of ikme ; as the fand-ftone, 

 the (lone that cutseaiily, calcareous, and a ftone 

 of a thread-like texture, ^tbly, Foflils proper- 

 ly fo called : metallic minerals, plumbago, py- 

 rites, cadmius, antimony, pompholyx, lapis afii- 

 us, and earths heavy with concrete juices. 

 //>//, Metals: gold, filver, quicklilver, copper, 

 white lead (tin), black lead (common lead), 

 alh -coloured lead (bifmuth), and iron. Al- 

 though this minerulogical efl'ay is not without 

 inany faults, yet they fliould be fafe from the 

 feverity cf criticifm, when we confider that A- 

 gricola was the fir ft who attempted fuch a fyf. 

 tem. 



The progrefs of metallurgy, after the time of 

 Agricola is fully illuftrated by a comparifon of 

 his writings with thofc of others; as of C. En- 

 cellius fie re mttnliua, in 1557; of Modcrtinus 

 J'lichs, whofcJ^driin/j/Ja, though written in 1567, 

 did not appear until 1595, publiflicd by his ion; 

 of L. Ercker in auhi Jubterranca, in 1575; and 

 of Muthtfius of Sarptiat, 1578, and a few others. 

 White vitriol begun to be manufactured at 

 Ruinmein>erg, anno 1574. 



About the time that the light of the Chri- 

 tfian faith had difpelk-d the idolatrous gloom of 

 f he northern regions, it is moll likely tlwt the 



people 



