Where unworked platina is approximately the same value as fine silver, there is another reason Platinum wouldn't suit a Silver fraud: the much greater specific density.
In London, where Wollaston's imported platina cost £ 0.13 and refined metal retailed for £ 0.75, the ratio appears equivalent: ~5x raw ore cost (in 1805.) The French price didn't drop until Breant's discovery of Wollaston's method and the large importation of 1811/2.
In London, where Wollaston's imported platina cost £ 0.13 and refined metal retailed for £ 0.75, the ratio appears equivalent: ~5x raw ore cost (in 1805.) The French price didn't drop until Breant's discovery of Wollaston's method and the large importation of 1811/2.
c. 1802: 1 Troy oz. Fine Silver = Fr 6.91
c. 1802: 1 Troy oz. platina ~ Fr 6.5
c. 1802: 1 troy oz. Platinum (refined, mfg) ~ Fr 40. ?
The price in 1812 was reportedly Fr 36.57/oz. troy.
c. 1803:
Citation: Encyclopedie Methodique, Ou Par Ordre De Matieres: Par Une..., Vol. 13 Antoine François de Fourcroy, Felix Vicq-d'Azur, Jean Le Rond d' Alembert (1805), p.72
1804: Silver and Platinum pens
Citation: Annales des arts et manufactures: ou mémoires technologiques sur ..., Vol. 26, R. O'Reilly (1804) p.125
c.1803?
1802:
A German reference from 1802: 16 Pfund platina for a 10,000 Franc telescope.
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