PrefacePart 1 Introduction BibliographyPart 2 1. The Spring of the Air (from New Experiments Physical-Mechanical, etc., 1660) 2. The Repulsion Theory (from Philosophiae Naturalis Principia Mathematica, 1687) 3. On the properties and motions of elastic fluids, especially air (from Hydrodynamica, 1738) 4. The Existence of Fire (from The Economy of Nature, 1798) 5. The Forces of Inorganic Nature (from Annalen der Chemie und Pharmacie, 1842) 6. On Matter, Living Force, and Heat (from the Manchester Courier, 1847) 7. The Conservation of Force (from Ueber die Erhaltung der Kraft, 1847) 8. The Nature of the Motion which we call Heat (from Annalen der Physik, 1857) 9. On the mean length of the paths described by the separate molecules of gaseous bodies (from Annalen der Physik, 1858) 10. Illustrations of the Dynamical Theory of Gases (from Philosophical Magazine, 1858) 11. On a Mechanical Theorem applicable to Heat (from Sitzungsberichte der Niedderrheinischen Gesellschaft, Bonn, 1870)Index