Lectures de Potentia Restitutiva, or of Spring

of a, c, or d. And so of the rest. This is what I call Congruity and Incongruity.

Now, just as we find that musical strings will be moved by Unisons and Octaves original: "Eighths", and other harmonious chords—though not to the same degree—so do I suppose that the particles of matter will be moved principally by such motions as are Unisons (as I may call them), or of equal Velocity with their own motions, and by other harmonious motions to a lesser degree.

I further suppose there is a subtle matter that encompasses and pervades all other bodies. This is the Solvent original: "Menstruum," a term from alchemy and early chemistry referring to a substance that dissolves or holds others in suspension in which they swim, which maintains and continues all such bodies in their motion, and which is the medium that conveys all Homogeneous or Harmonious motions from body to body.

Further, I suppose that all such particles of matter as are of a similar nature, when not separated by others of a different nature, will remain together. They strengthen the common Vibration of the whole group against the differing Vibrations of the surrounding original: "ambient" bodies.

According to this notion, I suppose the whole Universe and all its particles to be in a state of continued motion. Every particle takes its share of space or room in the universe according to the size of its body, or according to the particular power it has to receive and continue this or that specific motion.

Two or more of these particles, when joined immediately together and merging into one, become of another nature. They become receptive to a different degree of motion and Vibration, and form a compounded particle differing in nature from each of the original particles.

I suppose all bulky and perceptible original: "sensible" bodies whatsoever to be made up or composed of such particles. These particles have their peculiar and appropriate motions, which are kept together by the differing or discordant original: "dissonant" Vibrations of the surrounding bodies or fluid.