134 On the Formation of the Universe. 
necessary that the condensed parts, most remote, should by 
the motion of the aerial parts, be most turned out of a direct 
course towards the centre of the nucleus; and the supposi- 
tion is perfectly reasonable, that the deviation might be so 
regulated, that all, or nearly all of the condensed bodies 
would strike the central nucleus in a tangent to its circumfer- 
ence. By the expulsion of heat and light a compression 
would take place in the nucleus a little different from that in 
the aerial part of the wheel, but the same in effect. The 
various portions of the nucleus, having acquired a degree of 
actual velocity, would merely by their approach to the cen- 
tre, increase the angular velocity oi the nucleus. It is obvi- _ 
bs : 
at the motion derived from this complex source in the 
nucleus, would not stop at its surface, but would be constant- 
ly conveyed by means of friction between the concentric 
strata, to the extreme circumference of the aerial wheel, till 
the angular velocity become uniform throughout. While 
this complex process was going on in the planetary wheel, it 
would collect a belt of the ejected matter from all parts of its 
orbit, whose width would depend on the extent of that orbit, 
or the quantity of matter ejected within given limits from the 
solar wheel, and likewise in some degree on the rapidity of 
condensation. Great extent of orbit, great quantities of 
matter ejected within given limits, and rapid contraction in 
the solar wheel, would tend proportionally to increase the 
width of the belt; while rapid contraction in the planetary 
wheel would tend to diminish it. It is obvious that all the 
causes favourable to great width of belt, except slow con- 
‘traction in the planetary wheel, would belong peculiarly to 
to the higher planets. If the planetary wheel should ac- 
quire sufficient magnitude and motion, it would in its turn 
ect portions from its circumference, in the same manner 
as the solar wheel, and these portions would form its satellites. 
The motion of the’ planets and satellites, both on theit 
axes and in their orbits, would be generally in the seme di- 
rection with each other, and with the equator of the sun- 
Suppose ; fig. 1*, an accumulating planetary wheel, at the 
same distance from the solar wheel as b. A body at 
would be equally liable to fall to the right or left towards P, 
and of course the whole of:the matter in the same circle as 
b, would leave the direction of P’s diurnal motion doubtful. 
But as the solar wheel shrunk from P, its emitted portions 
* See Plate at the end. 
, e————— 
