123 
i8Si.j The Evolution of the Spheres. 
diversified forms. The declaration that a mass of moving 
particles has an excess of motion in one direction is equiva- 
lent to saying that the particles move together as a mass in 
that direction. It is precisely the same result as occurs 
when the heat-vibrations of molecules become converted 
into mass motion, through their vibrations having superior 
vigour in one direction. Such an aggregation of similarly 
moving particles, therefore, enables the particles to escape 
from their fixed positions in space. Mass motion arises out 
of the original individual motions of particles. 
This change in the original condition of matter is neces- 
sarily a progressive one. The essential advantage which 
attraction possesses over repulsion must produce a conti- 
nuous effeCt. In the original aggregations the similar may 
have only slightly exceeded the reverse motions. But as 
the moving particles approached, through this excess of 
attractive vigour, the increasing energy of attraction must 
have constantly tended to bring them into more accordant 
relations. Particularly when these individual attractions 
converged to form a general centre of attraction would the 
accordant motions be drawn towards this centre, the dis- 
cordant repelled from it. Thus in each aggregation there 
would arise a growing excess of similar directed motions, 
or, in other words, a growing rapidity of mass motion. 
To what extent this aggregation of similar and repulsion 
of reverse motions would proceed, it is impossible to say; 
but we can perceive the probability of the assembling of 
such like aggregations until wide regions of space might be 
occupied by matter having an excess of motion in one direc- 
tion, and other wide regions with an excess in the opposite 
direction. If the attractions and repulsions between parti- 
cles were originally neutralised through their motions being 
equal in all directions, the attractions and repulsions of the 
masses of the universe would still be neutralised by this 
sorting out of directions of motion, the excess motion of 
each mass of matter in one direction being balanced by an 
equal excess motion of another mass in the opposite direc- 
tion. Instead, then, of there being a universal gravitation, 
there would be a universal neutrality of directive force — the 
original neutrality between particles becoming a final neu- 
trality between spheres. 
But in each separate mass, considered by itself, attraction 
would be in excess of repulsion, since the accordant motions 
would be in excess of the reverse. And the force of this 
excess attraction must aCt to produce condensation of the 
mass, with an increased excess of accordant motions, and a 
K3 
