terral

It is sufficient that this does occur in the terral vortex immediately surrounding the earth.

Outlines of a Mechanical Theory of Storms Containing the True Law of Lunar Influence T. Bassnett

In the following figure, the arrows represent the ethereal current of the terral vortex; the linear circle, the earth; C the centre of gravity of the earth and moon, and, consequently, the central vortex or axis of the vortex of the earth, I represents the position of the inner vortex, and O that of the outer vortex.

Outlines of a Mechanical Theory of Storms Containing the True Law of Lunar Influence T. Bassnett

PP′ the poles, T the centre of the earth, C the mechanical centre of the terral vortex, M the moon, XX′ the axis of the vortex, and A the point where the radius vector of the moon pierces the surface of the earth.

Outlines of a Mechanical Theory of Storms Containing the True Law of Lunar Influence T. Bassnett

If the axis of the terral vortex does not coincide with the axis of the lunar orbit, we must derive this position from observation, which can only be done by long and careful attention.

Outlines of a Mechanical Theory of Storms Containing the True Law of Lunar Influence T. Bassnett

Now, if we consider the circle whose centre is C to represent the whole terral vortex, it must be that the medium composing it varies also in density at different distances from the sun, and at the same time is rotating round the centre.

Outlines of a Mechanical Theory of Storms Containing the True Law of Lunar Influence T. Bassnett

The moon's inertia forces the earth from the mechanical centre of the terral system, but is never able to force her clear from the central axis.

Outlines of a Mechanical Theory of Storms Containing the True Law of Lunar Influence T. Bassnett

The poles of the great terrestrial magnets, or even the position of a magnetic needle on the surface, are continually placed by the earth's rotation in a different relation to the axes of the terral vortex, and the tangential current, which is continually circulating around the globe, has its inclination to a given meridian in a perpetual state of change.

Outlines of a Mechanical Theory of Storms Containing the True Law of Lunar Influence T. Bassnett

The solar stream penetrates the terral vortex; and strikes the earth's atmosphere along the lines parallel to SP.

Outlines of a Mechanical Theory of Storms Containing the True Law of Lunar Influence T. Bassnett

That half of the vortex which is exterior to the orbit of the earth, being most dense, has consequently most inertia, and if we conceive the centre of gravity of the earth and moon to be in the orbit (as it must be) at C, there will not be dynamical balance in the terral system, if the centre of the vortex is also found at C.

Outlines of a Mechanical Theory of Storms Containing the True Law of Lunar Influence T. Bassnett

Still it would not be wonderful if they were felt over a vast area of thousands of miles as a consequence of _great_ disturbance in the elasticity of the ether in the terral vortex; as the solid earth must be permeable to all its motions, and thus be explicable on the general principles we have advanced.

Outlines of a Mechanical Theory of Storms Containing the True Law of Lunar Influence T. Bassnett