2544. But abstractedly or ideally considered, the nervous force certainly requires a time to elapse for the propagation of the stimulus, just as the light-tension darts through the æther only in a given time. As light traverses at the rate of 40,000 miles per second, so must the nervous power, if it obey similar laws to those of its prototype, and the length of a man be estimated at 1-5000th of a mile, glide through the human body in 1-200,000,000th of a second, which, "quoad" the phenomenon, cannot, of course, be observed.
2545. Accordingly, it is theoretically certain that the nervous power does not operate with absolute or unconditional velocity. To the validity of this statement, observations of many kinds, especially those made in diseases, and by astronomical computations of the strokes of the chronometer, afford additional evidence.
2546. Thus, for a stimulus impinging upon the brain, to act or be transmitted from thence into the toes, there elapses 1-200,000,000th of a second. In the event of disease, a retardation in the process is conceivable, and may admit even of being observed.
2. Function of the Globe-tissue.
2547. The dense or solid form is the matter, when it has died away; the function also, or the crystallization, died therein, so soon as the crystal was represented. The office of the bones is only to preserve the counterpoise to the nerve, to supply a limit, and therefore a support to its action, by which means the achievement of the latter first becomes possible.
2548. The business of the bone, is to play an antithetic part to the nerve, and nothing else, or to serve the latter as a "terra firma," upon which it may execute its plans. The bone suffers, and in this consists its office. The other offices of the bone, such as its being the firm and solid framework of the body, its protecting the nervous mass, &c., are subordinate matters, which are at once clearly understood.
3. Function of the Fibrous-tissue.
2549. There is the active motion. The primary motion is, however, a result of the polar tension induced in the æther by the light. Just as the heat has been produced in the æther by the light-polarity, so has been the animal motion in the fibres by the polarity of the nerves.
2550. Every fibre, when it is in motion, has necessarily two polar extremities. For the fibre stands between the artery which is oxygenous, and the nerve which is basic, or between a zinc and silver pole.
2551. In the conditions of rest the two poles must be neutralized, or, generally speaking, not in existence. This is only possible by disjunction of the galvanic circuit or chain.