Platinum Foil Battery
1849: 1 Troy Oz. Platinum-Black = Fr 31.10 (USD$ 5.87)
1849: 1 Troy Oz. Iridium (refined, mfg) = Fr 93.30 (USD$ 17.60)
Citation: Rapport du Jury Central sur les Produits de l'Agriculture et de l'Industrie ... Jury Central sur les Produits de l'Agriculture et de l'Industrie (1849) p.837
1849: 1 Troy Oz. Platinum (USA: Imported Ingot, Bulk) ~Fr. 39.75 ($ 7.50)
1849: 1 Troy Ounce Platinum (USA: Imported Ingot, Whols.) ~Fr. 44.17 ($ 8.33)
1848/9: 1 Troy Oz. Platinum (USA: Semi-Mfg, Trade) = Fr. 58.30. ($ 11.)
He displayed Gold and Platinum pens, tipped with ruby or Osmiridium, nibs which he invented and perfected in 1842. In 1843, the price for ruby-tipped pens was, Fr 18.; today it is Fr 11. For those tipped with Osmiridium, the price was reduced from Fr 12. to Fr 6. and however, Iridium, which worth Fr 100. per Kilogram in 1843, now costs Fr 3. per Gram, an increase due to the lower abundance of Iridium in platina ores mined today.
Where 15,000 grains = 1 Ozt.?
Dated German source!!!!
1849: 1 Troy Ounce Platinum (Paris: mfg) = Fr 31.1 (USD$ 5.94)
Citation: Allgemeine Waren-Fabrikaten- u. Maschinen: Waren-Preis von u. für Deutschland (1850) p.64
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