1. Brush, S. G. (1976) The Kind of Motion We Call Heat, 2 vols., North-Holland, Amsterdam.
2. Cardwell, D. S. L. (1967) ?Early Development of the Concepts of Power, Work and Energy,? The British Journal for the History of Science 3, 209?224.
3. Cardwell, D. S. L. (1971) From Watt to Clausius (The Rise of Thermodynamics in the Early Industrial Age), Cornell University Press, Ithaca.
4. Carnot, S. (1824) Réflexions sur la Puissance Motrice du Feu et Sur les Machines propres a Développer cette Puissance, Bachelier, Paris, translated by R. H. Thurston (1890), republished in E. Mendoza (ed) (1960), pp. 1?59. Also in R. Fox (ed) (1976), pp. 55?179.
5. Clapeyron, E. (1834) Journal de l'École Polytechnique, 14, 153, translated by E. Mendoza, in E. Mendoza (1960), pp. 71?105.