T04 [Jane 21, 1878. 
Chase. | 
which 7 = Gummere’s criterion ; (= number of planetary rotations in 
one orbital revolution ; R = radius of nebular contraction ; p= Sun’s 
present radius. Taking Herschel’s values for T and t we have 
dBA R R 
n(.) acl AO 
ys 110.4 On 102.4 5A, jhilieal 
Q 177.6 2, 166.4 ey 176.6 
a) Psi QQ, 222.2 
J 361.8 o,  801.5 
3) 445.4 3) 427.1 to 719.4 26, 444.4 
y 1192.5 y, 1185.9 
1 1829.5 bh, 1876.7 
B  8245.7 LW, 3258.9 
~~ 
It thus appears that : 
1. All the points of incipient condensation, (1), are within Wirk- 
wood’s ‘‘spheres of attraction.’ 
2. In the pair of extra-asteroidal planets which are nearest the asteroidal 
belt, the incipient points are near the secw/ar aphelion of the inner, and the 
secular perihelion of the outer planet. 
3. In the pair of intra-asteroidal planets which are nearest the asteroida] 
belt, the incipient points are near the mean aphelion of the inner and the 
mean perihelion of the outer planet. 
4. The sum of the radii of nebular contraction, for the two principal 
planets of the solar system (1192.5 + 1829.5 = 3022), is almost precisely 
equivalent to the sum of the mean perihelion radii of the same planets. 
(2, 1069.6 4+- bh , 1950.4 = 3020). 
R 
5. Thesecondary points of incipient condensation, — (2,, are all refera- 
p 
ble, through the simple accumulation of o¢s yiva, to primary mean aphelia. 
6. The significance of the fourth accordance is increased by Stockwell’s 
discovery,* that ‘the mean motion of Jupiter’s node on the invariable plane: 
is exactly equal to that of Saturn, and the mean longitudes of these nodes 
differ by exactly 180°.” 
7. Gummere’s criterion confirms the theory of Democritus, that the evo- 
lution of worlds was due to a vortical movement, which was generated by 
the descent of the heavier atoms through the lighter. 
* Loe, cit. 
