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2051.3 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... And also the art of melting... and assaying of them is plainly declared... Whereunto is added a real experiment whereby every ignorant man may... try whether any piece of gold... be true or counterfeit... Also a perfect [sic] way to try what colour any berry, leaf... bark, or wood will give... 4° London 1679 Ferguson
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