In article <i4ydnXskRO_upCbVnZ2dnUVZ_hWdnZ2d@earthlink.com>,
 "Jon G." <jon8338@peoplepc.com> wrote:

> Any origin is never an infinitesimal point, but a sphere of small radius 
> that forms a basis for measurement.  When the radius is small, the sphere 
> approximates an infinitesimal point, and measurements from either the inner 
> or outer surface of the sphere are the same.  

Stop right there and explain, please. What do you mean by the outer and 
inner surface? The surface of a sphere has no thickness.

If you're thinking of a sphere made, say, out of physical material, so 
that it has some thickness, then the outer and inner surface area are 
ALWAYS a little different, regardless of how small the radius gets.

You have to explain what you mean.