’s, all we have to do is to introduce them into the equations of the geodesics, and automatically we shall obtain the equations of free motion of particles moving in our system of co-ordinates under the influence of a central mass
. It is these equations which yield us the double bending of light and the motion of the planet Mercury.
We may note that if we neglect to consider the influence due to the variations in value of
as
increases, that is, if we assign to