he whole surface of the globe.

Now with our definite conception of the aetherial lines of force
traversing space, and existing on all sides of the earth, these
suggestions of Faraday's obtain an increased value in relation to the
varying intensity of terrestrial magnetism, and will account for the
variations in a satisfactory manner from the aetherial standpoint, if
taken in conjunction with the electro-magnetic character of the Aether.
Of course, what applies to the earth equally applies to all the other
planets, as they also are magnets according to Art. 87, so that they
will also possess their magnetic fields, with their own lines of force,
and their variations in intensity and magnetic dip.

Hitherto we have only considered the problem of the earth and all the
other planets, as magnets, from the stationary standpoint, and the
problem faces us as to what effect the movement of the earth and all
other planets through the Aether will have upon their magnetic fields,
and their lines of force. Now from Clerk Maxwell's mathematical
calculations, we learn that the movement of any magnetic body through
space will practically have no effect upon the relation of the field,
and the lines of force to the moving magnet; that is to say, the
magnetic field and the lines of force move with the earth and the
planets through space, as they journey round the sun with their varying
velocity. Maxwell has conclusively proved that the mathematical
equations for moving bodies in relation to their magnetic lines of
force, and induction, are exactly the same as the equations for
stationary bodies, and if this be true, then it follows that the
physical conditions for both stationary and moving bodies are the same.

On this point Maxwell writes: "By its motions this (moving) matter
carries with it its lines of force, and electricity and magnetism may be
regarded as free ends of these lines. Hence when both causes act
together there can be no relative motion of true magnetism with
reference to surrounding matter," etc.

"Under these circumstances electricity and magnetism move with the
matter in which they are present as if they were indestructible and
adhered firmly to the parts thereof." So that from Maxwell's equations
and statements we learn that the magnetic lines of force around every
planet, and every satellite in space, move with the planets in their
orbits round the sun. But as these magnetic lines of force are composed
of aetheri