CONTINUOUS MOTION.

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The motion which continues after the body has ceased to be in contact with the sensible impelling cause, is named continuous motion. The body impelled receives neither force nor motion from the impelling cause: neither force nor motion is anything transferrable or anything communicable; forcible velocity and change of place are but accidents of matter, and but local, casual circumstances of bodies. Being inert, the body cannot move itself. Motion, therefore, is but a physical effect, and must have a cause equal to the duration of the effect: motion after impulse has ceased, would be effect without cause—which is an absurdity and impossibility; therefore impulse is constant as motion, however insensible the impelling cause. These dynamic principles cannot be too frequently brought to mind, considering the general erroneous opinion on the subject which maintains, that "a body continues in motion because it cannot stop itself;" which is effect without its equal of cause.

A body in motion is under unequal pressure on opposite sides, greater on the rear than front. The air in front resists, that in the rear may be said to recede from the body; therefore neither impels the projectile. Under such circumstances there remains but the alternative, that of the electric constitution of the body being changed by the previous impulse, by which medium of space accumulates on one side, or decreases on the opposite. The phenomenon admits of being thus illustrated:

The first, previous or sensible impulse, effects de-electrisation of the body on the rear or side of impulse; influent medium of space immediately occupies the vacated rear, and by its pressure impels the body through the air. The velocity of the previous impulse, gives momentum to the body greater than the included freely-removable elementary matter can obtain; of consequence the latter is left behind in the air, and the pressure of the acquired medium of space in the rear, is the continuous impelling cause. Thus is the mistake of Dugald Stuart made evident, that "motion is the immediate and only effect of impulse."

It is not the air's resistance which makes the motion of a projectile decline and end. Taking impulse as ten, resistance four, there remains six degrees of unresisted impulse, which should impel the body for ever through the atmosphere. The decline and cessation of impulse is that which brings the projectile to rest.

From the instant the body has ceased to be in contact with the sensible impelling cause, electric matter is re-entering the rear, which displaces gradually the impelling medium; and as are the increments of the former, so are the decrements of the latter, and so is the decline of motion.

Ascending and Descending Motion.

—The rear of the vertically-impelled body becomes vacated of minus-pressure matter, and replaced with medium of space; by the latter, and general pressure, the body is forced upwards as a cork by water. While ascending, the rear is acquiring electric matter and losing the impelling medium,—the velocity of course declines; and when at the highest, the body is at rest in the air for an instant, then is precipitated to the ground. During the entire of the descent, electric matter is vacating the rear and medium of space entering, consequently the fall is accelerated. Now as the body cannot fall of itself; as descending motion is of increasing velocity, while motion in every other direction is retarded; and, because all descent has the same centripetal direction, so should there be some distinct cause to produce these conspicuous effects, which, to trace, suggest the following hypothesis:

Centripetal Flow.

—The different motions of the globe affect all bodies on its surface, so as to appear to the inhabitants as if the whole were at rest; supposing thence, that the centre of the earth is the centre of motion, the following may be considered probable consequences:—The general pressure being less at the centre and axis than on the surface of the earth, obliges the medium of space to flow through the atmosphere and entire surface, centripetally, to the centre, thence along the axis, carrying with it electric matter, and has exit at the poles, which polarizes the globe and produces the boreales. The centripetal flow retains the atmosphere to the earth; precipitates bodies from the air in a centripetal direction; accelerates the descent; and retards all motion not in its own direction: it prevents vertical ascent being equal to impulse, the difference being employed in bearing against the flow. The flow makes bodies ponderate or have weight, causes the dip and direction of the compass-needle.


                                                                                                                                                                                                                                                                                                           

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