Research gave the unexpected result that, by combination of cyanic acid with ammonia, urea is formed. A noteworthy fact since it furnishes an example of the artificial production of an organic—indeed, a so-called animal—substance from inorganic materials!
'Über Künstliche Bildung des Harnstoffs', Annalen der Physik und Chemie, 1828, 12, 253. Trans. Quarterly Journal of Science, 1828