We have the names in one of the tables arranged in two columns, representing, as you see, two groups-platinum, iridium, and osmium constituting one group; and ruthenium, rhodium, and palladium the other.
"The Chemical History Of A Candle"
Michael Faraday
We shall now shew you this same process of boiling the silver, cast on a screen from the electric lamp which you have before you; and while Dr. Tyndall is kindly getting the lamp ready for this purpose, let me tell you that Deville proposes to throw out in this way all these extraneous things that I have spoken of, except two-namely, iridium and rhodium.
"The Chemical History Of A Candle"
Michael Faraday
It so happens, as he says, that iridium and rhodium do make the metal more capable of resisting the attacks of acids than platinum itself.
"The Chemical History Of A Candle"
Michael Faraday