Origine or Production of Divers Particular Qualities: … (London, England: E. Flesher (printer), 1675). At the conclusion of Experiment VI, Boyle notes that if a nail is driven completely into a piece of wood, then further blows with the hammer cause it to become hot as the hammer's force is transformed into random motion of the nail's atoms. From pp. 61-62: " … the impulse given by the stroke, being unable either to drive the nail further on, or destroy its interness [i.e., entireness, integrity], must be spent in making various vehement and intestine commotion of the parts among themselves, and in such an one we formerly observed the nature of heat to consist." "Lectures of Light" (May 1681) in: Robert Hooke with R. Waller, ed., The Posthumous Works of Robert Hooke … (London, England: Samuel Smith and Benjamin Walford, 1705). From page 116: "Now Heat, as I shall afterward prove, is nothing but the internal Motion of the Particles of [a] Body; and the hotter a Body is, the more violently are the Particles moved, … " Sometime during the period 1698-1704, John Locke wrote his book Elements of Natural Philosophy, which was first published in 1720: John Locke with Pierre Des Maizeaux, ed., A Collection of Several Pieces of Mr. John Locke, Never Before Printed, Or Not Extant in His Works (London, England: R. Francklin, 1720). From p. 224: "Heat, is a very brisk agitation of the insensible parts of the object, which produces in us that sensation, from whence we denominate the object hot: so what in our sensation is heat, in the object is nothing but motion. This appears by the way, whereby heat is produc'd: for we see that the rubbing of a brass-nail upon a board, will make it very hot; and the axle-trees of carts and coaches are often hot, and sometimes to a degree, that it sets them on fire, by rubbing of the nave of the wheel upon it." Henry Cavendish (1783) "Observations on Mr. Hutchins's experiments for determining the degree of cold at which quicksilver freezes," Philosophical Transactions of the Royal Society of London, 73 : 303-328. From the footnote continued on p. 313: " … I think Sir Isaac Newton's opinion, that heat consists in the internal motion of the particles of bodies, much the most probable … " From the footnotes on p. 84 of Rumford's paper of