Dr.? Erastus F. Cooke of Wethersfield, CT (close to Hartford) reported European Platinum Still prices from the Spring of 1833.
The Kepp platinum still held 136.383 liters; where boiler and syphon was £ 598.50 was taken at the USD was taken at a Silver Rate of 45.77 (USD$ 3,138.) ; at the Paper rate 54 pence, $2,660. This assumes Troy weight (495 ozt) but excludes any additional tariff, shipping & handling cost to New York. Importation duty of boiler plates in 1833 apparently added 25%, plus any additional local delivery charges to the buyer. Unknown freight, insurance, etc: +5%? Estimated NYC trade profit on a British still at the Paper rate, and competitive with reported French price plus duty = ~$247.50 or ~9.3% UK Price.
1833: 1 Troy Ounce Platinum (UK Mfg) = £ 1.20909 (USD$ 6.34; $5.37)
1833: 1 Troy Ounce Platinum (NYC: Mfg +30% Cost) ~ £ 1.572 (USD$ 7.)
1833: 1 Troy Oz. Platinum (imported Paris mfg @ NYC) = USD$ 6.00
1833: 1 Troy Oz. Platinum (NYC: Paris mfg still, w/duty) = USD$ 7.50
Citation: The American journal of science, Vol. 26 No.1 (1834) p.211
Mail from London to NYC was 40-45 days, to Wethersfield CT ~48-50 days
F. & N.G. Carnes, of New York & Paris, established in 1820.
Francis G. Carnes of Paris. Nathaniel G. Carnes of NYC?