François Arago, Robert GRANT (F.R.A.S.), Baden Powell, William Henry SMYTH (Rear Admiral.) (1857). “Biographies of Distinguished Scientific Men ... Translated by ... W. H. Smyth ... the Rev. Baden Powell ... and R. Grant”, p.264
"Essai sur le théorie des proportions chimiques" by Jons Jacob Berzelius (1819) translated in Henry M. Leicester and Herbert S. Klickstein "A Source Book in Chemistry 1400-1900" (p. 260), 1952.