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Cardan is the first, who in his fifth book, De Subtilitate, says, that , by conversion into ceruse, or by , gains one-thirteenth part in weight, and … - Jean Rey
" "Cardan is the first, who in his fifth book, De Subtilitate, says, that , by conversion into ceruse, or by , gains one-thirteenth part in weight, and gives this reason for it—The lead dies, for the celestial heart, which was its soul, vanishes; whose presence gives it life, and renders it light; as its absence occasions its death, and makes it heavy.
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About Jean Rey
John Rey (1583–1645) (or, in French) Jean Rey, was a physician of , France who in 1630 published a tract on , or of metals, after being notified by Brun, an apothecary of Bergerac, France, of Brun's experiments (as early as 1629) on the calcination of tin. Brun had melted 2 pounds six ounces of tin, and after 6 hours the resulting calx weighed seven ounces more than the original tin. More than one hundred and forty years before Antoine Lavoisier, John Rey recognized that in the calcination of lead or tin, part of the air provided an increase in mass to the calcined metal oxide. His work was eclipsed first by the phlogiston theory and then later, by Lavoisier's discoveries disproving the existence of phlogiston. Lavoisier's oxygen theory confirmed Rey's earlier report, of which Lavoisier claimed he was unaware. After the presentation of Lavoisier's 1775 memoir at the Académie des sciences, (1725-1798) wrote a letter to Abbé , director of the journal Observations sur la Physique, sur l'Histoire naturelle and sur les Arts, to ask him to publish an update notice, recognizing the priority Rey's work.
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Moreover, all the world is agreed, that from death to life there is no return. Yet the chemists assure us, if we moisten the calx of lead, and mix it with water in which samphire (salicot) has been dissolved, then, having dried it, put it in a crucible with a small vent, and heat strongly and quickly, that we shall reduce it to its original state.
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