arsenium

Updated: May 9, 2025

An element is found in one part that may not be found in another. Hydrogen shows its line in the spectrum derived from every heavenly body that has been investigated; but not so aluminium or cobalt. Sodium, that is, the salt-producing base, is discovered everywhere, but not nickel or arsenium.

- Notable Events of the Nineteenth Century: Great Deeds of Men and Nations and the Progress of the World