Anfangsgründe der Stöchyometrie … (in 3 vol.s) [Rudiments of Stoichiometry …] (Almanca). 1. Breslau and Hirschberg, (Germany): Johann Friedrich Korn der Aeltere. 1792. s. 121. From p. 121: "Die Stöchyometrie (Stöchyometria) ist die Wissenschaft die quantitativen oder Massenverhältnisse … zu messen, in welchen die chemischen Elemente … gegen einander stehen." (Stoichiometry (stoichiometria) is the science of measuring the quantitative or mass relations in which the chemical "elements" exist in relation to each other.) [Note: On pp. 3–7, Richter explains that an "element" is a pure substance, and that a "chemical element" (chymisches Element (Elementum chymicum)) is a substance that cannot be resolved into dissimilar substances by known physical or chemical means. Thus, for example, aluminium oxide was a "chemical element" because in Richter's time, it couldn't be resolved further into its component elements.]
