...characteristics of some of these forces. Sir Humphrey Davy says that the immediate cause of the phenomena of heat is motion, and the laws of its communication are precisely...the same as the laws of the communication of motion. We know that all molecular movement is accompanied by the evolution of heat to a greater or leas degree....

...got over his difficulties and confusion of reasoning. In 1812 he enunciated this proposition : — " The immediate cause of the phenomenon of heat, then,...same as the laws of the communication of motion." When Davy was in a position to make that statement he had only to take it in addition to the second...

...therefore with good reason that Davy drew the inference that " the immediate cause of the phenomena of heat is motion, and the laws of its communication are precisely...same as the laws of the communication of motion"*. The researches of Dulong on the specific heat of elastic fluids were rewarded by the discovery of the...

...but Davy, in 1812, for the first time stated plainly and precisely the real nature of heat, saying, " The immediate cause of the phenomenon of heat, then, is motion ; and tho laws of its communication are precisely the same as the laws of the communication of motion." The...

...than 1799, when his first paper was published. In fact, in 1812 he enounces this proposition : — ' The immediate cause of the phenomenon of heat, then,...same as the laws of the communication of motion.' Now, we see at a glance to what an immense extent the science had been advanced in Davy's time. When...

...the influence of radiant heat or other outward disturbance. And in 1812, Davy announced the axiom. " The immediate cause of the phenomenon of heat, then,...same as the laws of the communication of motion." But all the while, as late as 1840, these ideas were laughed at as extravagancies, when it was made...

...Hence Davy* drew the conclusion that "the immediate cause of the phenomena of heat is motion, and t lie laws of its communication are precisely the same as the laws of the communication of motion." The mechanical, or dynamical theory, which regarded heat as consisting in a state of molecular motion,...

...35°; and he announced the important proposition, that " the immediate cause of the phenomenon of heat is motion, and the laws of its communication are precisely...same as the laws of the communication of motion." Our more extended knowledge enables us to confirm the views expressed by Davy. now accepted as 772...

...motion." Davy defines heat as "a peculiar motion," and in his " Chemical Philosophy" tells us that " the laws of its communication are precisely the same as the laws of the communication of motion." Locke, later on,* insists that " what in our sensation is heat, in the object is nothing but motion."...

...corpuscles of bodies tending to separate them.' Again, in 1812, Davy thus states his theory : — ' The immediate cause of the phenomenon of heat, then,...same as the laws of the communication of motion.' Another way of stating the above is that heat is a form of energy. To make this point clear before...