Note 42 — Chapter IV · SCIENTIFIC RESEARCHES: SECOND PERIOD.
Reading edition
From ἄνω upwards and ὁδός a way; and κατά downwards and ὁδός a way. The words cathode and cation are now more usually spelled kathode and kation. Faraday sometimes spelled the word cathion (Exp. Res. Art. 1351), as did also Whewell (Hist. of Ind. Sciences, vol. iii. p. 166).