2051.4 Gabriel PLATTES. A discovery of subterranean treasure: (viz.) of all manner of mines and minerals, from the gold to the coal, with... rules for the finding of them... Also the art of melting... and assaying of them made plain...To which is added, a real experiment, to try whether any piece of gold be true or counterfeit... Also a sure way to try what colour any berry, leaf... bark, or wood will give... 4° London [1715?] Ferguson