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| - […] I had once brought me a certain Earth, by a Gentleman that digg'd it up in this, or ſome neighboring Country, vvhich, though it ſeem'd but a Mineral Earth, did really afford, to a very expert tryer of Metals of my acquaintance, a not deſpicable proportion of Gold. (en)
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Bibliographic Citation
| - 1663, Robert Boyle, “Essay V. Proposing Some Particulars wherein Natural Philosophy may be Useful to the Therapeutical Part of Physick.”, in Some Considerations Touching the Vsefulnesse of Experimental Naturall Philosophy, […], Oxford, Oxfordshire: […] Hen[ry] Hall printer to the University, for Ric[hard] Davis, →OCLC, part II, section I (Of It’s Usefulness to Physick), chapter III, page 132: (en)
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