A discovery of subterranean treasure : viz. all manner of mines & minerals, from the gold to the coal, with plain directions and rules for finding them in all kingdoms and countries. : Also the art of melting, refining and assaying them made plain and easy ... : To which is added a real experiment, to try whether a piece of gold be true or counterfeit ... : Also a sure way to try what colour any berry, leaf, flower, stalk, root, fruit, seed, bark or wood will give: together with directions for making colours that shall not stain nor fade. : Very necessary for everyone to know, whether he be a traveller by land or sea, or in what country, dominion, or plantation soever he may inhabit. / - Plattes, Gabriel, ([publisher not identified],, 1792)