EUDIOMETRY
Etymology
Noun
eudiometry (uncountable)
(chemistry, now, chiefly, historical) The art or process of determining the constituents of a gaseous mixture by means of the eudiometer, or for ascertaining the purity of the air or the amount of oxygen in it.
Source: Wiktionary
Eu`di*om"e*try, n. Etym: [Cf. F. eudiométrie.] (Chem.)
Definition: The art or process of determining he constituents of a gaseous
mixture by means of the eudiometer, or for ascertaining the purity of
the air or the amount of oxygen in it.
Source: Webster’s Unabridged Dictionary 1913 Edition