UK, 1831: W. & S. Jones Catalogue

1831: 1 Troy Oz. Platinum (Paris: Mkt, Bulk?) = £ 0.972 (Fr. 24.634)

In 1831, Jones' Patinum rate afforded no discount even though the 1829 refined & ingot price(s) had collapsed over -30%.  See Catalogue of optical, mathematical, and philosophical instruments, made and sold by W. and S. Jones, (30) Lower Holborn, London (1831) :

p.14: "Of Platina: Small retorts, crucibles, dishes, spoons, forecepts, thin rolled foil, wire, &c. per oz. 24s. to 1l. 15s."

1831: 1 Ozt. Platinum (Sponge? Whols./Ret.)  = £ 1.20 ($ 5.68)

1831: 1 Ozt. Platinum (Mfg, Whols./Ret.)  = £ 1.75 ($ 8.28)

c.1831?: Edward Davy purchased a purportedly medical business which turned out to be an operative chemist's. His first Catalogue dates to the very early 1830s; by 1835

1831: 1 Ozt. platina (Ore, Whols./Ret.)  = £ 0.90 ($ 4.26) 
1831: 1 Ozt. Platinum (Sponge, Whols./Ret.)  = £ 1.50 ($ 7.10)
1831: 1 Ozt. Platinum (Foil, Semi-Mfg, Whols./Ret.)  = £ 1.60 ($ 7.57)
1831: 1 Ozt. Platinum (Mfg, Whols./Ret.)  = £ 1.70 - 1.80 ($ 8.04 - 8.52)


Citation: Chemical apparatus, tests, and preparations, employed in philosophical and medical chemistry, mineralogy, &c. Manufactured with every care, and sold at moderate prices,  E. Davy, Chemist, 390, Strand, London (1830?)






1831: 1 Troy Oz. Platinum (Ingot, SPb Mkt)  = £ 0.75 (USD$ 3.55)

Plagiarized data, from the serial of Rees' The Cyclopædia dated to February 1814!

Citation:  Minerals and metals: their natural history and uses in the arts ... Society for Promoting Christian Knowledge (Great  Britain). General Literature Committee (1835), p.55