John Stuart Mill (2017). “The Collected Works of John Stuart Mill: Utilitarianism, The Subjection of Women, On Liberty, Principles of Political Economy, A System of Logic, Ratiocinative and Inductive, Memoirs…”, p.189, e-artnow
George Wilson (1851). “The life of the Hon. Henry Cavendish: including abstracts of his more important scientific papers, and a critical inquiry into the claims of all the alleged discoverers of the composition of water”, p.186