USA/France, 1893/4: Exhibitions of Palladium & Iridium Ingots

1894: 1 Troy Ounce platina (Russian ore, 83%; Ural Spot?) = Fr. 24.13-26.58

Apparently not the 64.25 kg mass (2,097.8 oz, Troy) model exhibited by Johnson & Matthey Co. at the Paris Exposition of 1878 (then valued at Fr 260,000.), this "brique de palladium" at the Exposition d'Anvers of 1894 is apparently the 1,000 oz. ingot model seen the previous year in Chicago (1893.)

1878: 1 Troy Ounce Palladium (refined, wholesale?) = Fr. 124 (USD$ 24.)
1894: 1 Troy Oz. Palladium (refined, wholesale?) = Fr. 176.40 (USD$ 34.32)

1893: 1 Troy Oz. Iridium (refined, wholesale?) = £6.25 (USD$ 30.50)
1894: 1 Troy Oz. Iridium (refined, wholesale?) = Fr 157.50 (USD$ 30.54)

Citation: L'Éclairage électrique, Volume 1, 1894, p.254.


Citation: Ibid.


Platinum-iridium standard, at the intrinsic rate (c. 1893?)



Citation: The Chemical news and journal of physical science, Vol. 68 (1893) p.161