The writer need scarcely state that in the short space at his disposal, in the pages of this book, he has been able merely to outline his Theory of Dynamic Force, as applied to the Inorganic World. The patience of the average reader has limits--and he must pass on to other features of the workings of the theory, namely the Mental Life of Man, in which the same laws are manifested. But, he feels that those interested in the phases of the subject touched upon, may explain for themselves the missing details by reference to the teachings of Modern Science on the subjects of Physics, remembering, _always_, to substitute the Theory of Dynamic Thought for the "Ether" theory that Modern Science borrows from Aristotle as a temporary "makeshift." The writer believes that this Theory will account for many of the missing links in Physics--a broad statement, he knows, and one either extremely impudent or superbly confident, according to the view-point of the critic. * * * * * The writer may be able to throw a little additional light, probably, upon the question of the relation between Gravitation, and the Excitement-waves of Radiant Energy. Without attempting to go into details, he wishes to suggest that in view of the fact that the Particles are connected by the "Lines of Gravitation," any great, extended, and rapid disturbance of a number of Particles would cause a series of undulating or wave-like movements in the "lines," which might be spoken of as waves of "Agitation or Unrest" in the Lines of Gravitation. This Agitation, or Unrest, of course, would be thus communicated to all other Particles toward whom lines extended, the intensity or effect of such Agitation or Unrest depending upon the relative distances, and the number of Particles involved. We may easily imagine how the intense and high rate of vibration among the Particles of the Sun, manifesting as intense Heat, would cause a like high degree of Agitation or Unrest among the Lines of Gravitation--the "lines" dancing backward and forward; around and about; following the movements of the Particles, and thus producing "waves" of Gravitational Agitation and Unrest, which when communicated to the Particles of the Earth, would produce a similar Excitement among the Particles of the latter. In the same way the "Sun-spots," and consequent terrestial electrical disturbance may be explained. While not absolutely tying himself to this particular conception of the details of the workings of the law, the writer feels free to say that he considers it a very reasonable idea, and one that in all probability will be found to come nearer to explaining the phenomena, than any other hypothesis. It certainly coincides with the "undulatory wave" theory of Science. The idea is but crudely expressed here, for lack of space, it being impossible to attempt to go into details--the mere mention of general principles being all that is possible at this time and place.