Carbon is, as may easily be shown and as I shall explain in greater detail later, tetrabasic or tetratomic, that is 1 atom of carbon = C6 = 12 is equivalent to 4 At. H.

'On the so-called Copulated Compounds and the Theory of Polyatomic Radicals', Annalen, 1857, 4, 133. Trans. in J. R. Partington, A History of Chemistry (1972), Vol. 4