W. A. Norton—Molecular and Cosmical Physics. 385 
8. The effective force theoretically deduced, conforms to the 
established laws of universal gravitation. 
4. The high improbability that the force of gravitation can 
take effect on cosmical bodies, and be transmitted through 
theta without being in any sensible degree diminished, or inter- 
cepted, cannot be urged as an objection to the present view, 
since it is the very interception of a portion of the wave-force 
that gives rise to the effective gravitating tendency. 
. The conclusion reached by Laplace, that the velocity of 
the gravitating fluid, if such there be, must be immeasurab 
greater than the velocity of light, does not militate against the 
present theory. For when we consider that the gravitation 
ties, that will be any sensible fraction of the entire impulsive 
action, or indeed of the differential action that constitutes the 
effective force of gravity. 
6. If these be legitimate conclusions, then it would appear 
b 
the only intercepting action would then be that already con- 
sidered, from which the gravitating tendency results. : 
Let it not be supposed, however, that there is an theoretical 
objection to the notion of a separate itati 
an ether more subtile than the luminiferous, and that the arbi- 
hypothesis of such a medium does not seem to be de- 
manded by the phenomena. If the hypothesis were adopted, 
