The beautiful theory of atomicity has its home in the attractive but somewhat misty border land lying between fancy and reality and cannot, I think, suffer from any not absolutely irrational guess which may assist the chemical enquirer to rise to a higher level of contemplation of the possibilities of his subject.
On An Application of the New Atomic Theory to the Graphical Representation the Invariants and Covariants of Binary Quantics - With Three, Appendices, American Journal of mathematics, Volume 1, Number 1, 1878 (p. 79)