Confirmed in a US merchant journal, @ Silver Rouble rates, likely the St. Petersburg Market Price. Paris Kg Rate was Fr.1.40/Ozt higher, which might reflect transport cost.
1849: 1 Troy Oz. platina (@ St. Peterburg, intrinsic?) = Fr 26.59 (USD$ 5.00)
1848/9: 1 Ozt. Platinum (Paris: Semi-Mfg, Retail) = Fr. 37.324 (~$ 7.18)
1851/2?: 1 Troy Ounce Platinum (Mfg, Intrinsic?) = Fr 37.3242 ($ 7.17 - 7.24)
Citation: Leçons elementaires de chimie; Adolphe Bobierre (1852) p. 471
c.1850: Price of a Platinum Still, Frcs. 25,000
Citation: Encyclopédie théologique: ou Série de dictionnaires..., Vol. 52; Jacques-Paul Migne
If refined &manufactured Platinum was sold in Paris for Fr 31.1 (USD$ 5.94)
Other 1850 Nuremberg (German) Prices here.
1850: 1 Ozt. Platinum Coin (Paris: Scrap/Kg., ~97% Fine) = Fr 27.99 (USD$ )
1850: 1 Ozt. Pt @.999 (SPb: Coin Scrap, Intrinsic) = Fr 28.86 (USD$ )
Citation: Travaux de la commission française sur l'industrie des nations, Vol. 6 (1854) pp.254-5
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