126 The Evolution of the Spheres. [March, 
distant movements. Its tendency to rotate around the 
centre would therefore have an excess of vigour over the 
opposite tendency of more distant movements, less influenced 
by gravity. Thus a positive motion of rotation would ensue. 
And from this would at once arise a new excess of attractive 
energy, all motions parallel to the rotation being drawn in- 
wards, all reverse motions driven outwards, until finally the 
central rotation communicated itself to the whole mass. 
And as this vigour of rotation increased, through repulsion 
of the opposite motions, the movement of the mass through 
space would slowly cease to gain new vigour, the secondary 
process of evolution finally quite taking the place of the 
primary. But the principle involved does not stop here. 
The production of accordant directions of motion still goes 
on. Only in the gaseous portions of the earth’s material 
does the energy in excess of that employed in cosmical 
movements yield irregular motion. Partly in the liquid, and 
largely in the solid form of matter, this irregularity has been 
reduced to regularity. The impacting motions, which in 
the gas move in eveiy direction, in the solid are constrained 
in direction, the particles, so far as this increment of their 
motion is concerned, being confined to a fixed locality ; and 
their motions within this limited space are probably in the 
line of direction of the cosmical motions, since they do not 
result from impaCt, except in a minor degree, and are thus 
free to conform to the attractive influences exerted upon 
them from without. Other results of the principle of motion 
which we have here considered appear in the movements of 
matter in atomic and molecular aggregation. But a consi- 
deration of these must be left for a future article. 
There are, however, certain cosmical consequences of the 
hypothesis yet to be considered. It might, for instance, be 
supposed that in the vast regions of space between the con- 
densed spheres the aggregating principle here advocated 
would reappear, and new condensations of matter arise. 
Nor is it impossible that minor aggregations of this kind 
have arisen : but large aggregations are very unlikely to 
appear. For the material occupying this space is the recep- 
tacle of the vast volumes of moving energy lost as temper- 
ature to the condensing spheres. This must aCt to increase 
the motive vigour and the diffusion of the matter of space 
(it expanding to fill the void left by the contracting matter 
of the spheres), and to reduce the vigour of attraction be- 
tween its separate particles. Moreover, the motive energy 
thus poured out from the spheres comes from sources of 
diverse motions, so that every tendency to produce accordant 
