1850: 1 Troy Oz. Platinum (Portsmouth, UK: Sheet, Whols.) = £ 1.60 (USD$ 7.79)
1853: 1 Troy Oz. Platinum (Semi-Mfg, Ret.) = £ 1.40 (USD$ 6.50)
1853: 1 Troy Oz. Gold (Semi-Mfg, Ret.) = £ 4.25 (USD$ 19.73)
1853: 1 Troy Oz. Platinum (Paris: Semi-Mfg, Ret.) ~ £ 1.86 (Fr 46.65)
1855: 1 Troy Oz. Platinum (Semi-Mfg, Trade) = £ 1.30 (USD$ 6.36)
Foil Battery, ea.: Pt 1.73 Grams/ 26.66 Grains Troy = £ 0.2611 (USD$ 1.21)
Sheet Battery, ea.: Pt 9.41 Grams/ 145.2 Grains Troy = £ 0.5917 (USD$ 2.75)
Dalgleish Pt Battery, ea.: Pt 25.815 Grams/ 398.4 Grains Troy = £ 1.462 (USD$ 6.79)
Grove's Battery:
Where One Box was 7" long x 4" wide x 4" tall, factoring case, each cell should have been 2" x 2" wide (x4" tall?), with ~145 Grains Troy (~9.41 Grams)
1853: 1 Troy Oz. Platinum (Semi-Mfg, Ret.) = £ 1.35 (USD$ 6.27)
Citation: Papers on Subjects Connected with the Duties of the Corps of Royal Engineers, Vol. 4 (1855)
1853: 1 Troy Oz. Platinum (Mfg., Ret.) = £ 1.75 (USD$ 8.51)
Citation: Transactions, Vol. 1, ; North of England Institute of Mining and Mechanical Engineers, p.453
1853:
Commercial value of platina : ~50% Gold.
1852/3: 1 Troy Oz. platina (Ore, Retail) = £ 0.823 (USD$ 4.0)
1852/3:
Citation: Rheinisches Mineralien-Comptoir: Catalogue of mineralogical, geological... A. Krantz (1853)
c.1855: "Rhodium" (Iridium) for Pen Points
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