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Thus we have shown that the critical condition of dynamical instability must have occurred in the early period of the earth-moon history, if the agents then in operation were those which we now know. The further development of the subject must be postponed until the next lecture.
Now, from the fact that the dynamical ideas admit a condition of phenomena which does not form a part of the series of phenomena, arises a result which we should not have expected from an antinomy. In former cases, the result was that both contradictory dialectical statements were declared to be false.
If, however, any trifling derangement should take place in the last condition of the system, so that the month and the day departed slightly from equality, there would instantly be an ebbing and a flowing of the tides; and the friction generated by these tides would operate to restore the equality because this condition is one of dynamical stability.
This synthesis can be divided into those of aggregation and coalition, the former of which is applied to extensive, the latter to intensive quantities. Consequently it is a synthesis of that which though heterogeneous, is represented as connected a priori. This combination not an arbitrary one I entitle dynamical because it concerns the connection of the existence of the manifold.
If they force upon us their conclusions respecting statical aggregates, or crystalline forms, let them accept the inductions that inevitably follow in the case of dynamical aggregates, or living organisms.
That it is a mere hypothesis or conjecture, designed, not to establish the historical fact, but to explain merely the dynamical possibility of the production of the planetary bodies by the operation of known natural laws, must be admitted, I think, even by its most enthusiastic admirers.
The calculations were performed; but, when compared with fact, though the agreement was quite sufficient to show the general correctness of the cause and mode of propagation assigned, yet the whole velocity could not be shown to arise from this theory. There was still a residual velocity to be accounted for, which placed dynamical philosophers for a long time in great dilemma.
It is in the study, both statical and dynamical, of living bodies that it first acquires its full development; and its use elsewhere can be only through its application here." COMTE'S Positive Philosophy, translated by Miss Martineau. Vol. i. p. 372.
A well-known dynamical principle here comes into play.
We must suppose them able to remember and forget, i.e. to retain certain vibrations that have been once established gradually to lose them and to receive others instead. We must suppose some more intelligent, versatile and of greater associative power than others. Thinking All thinking is of disturbance, dynamical, a state of unrest tending towards equilibrium.
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