But here a most important point must be noted. For stability to endure, a certain condition would have to be satisfied. Calculations, based on the
formula mentioned on [p. 314], prove that the mean density
of matter would have to be equal to
. In other words, the total amount of matter in the world would have to be proportional to the radius of the universe.
Assuming these conditions to be satisfied, it would be possible to calculate the volume of the universe, provided we knew the mean density
of the matter distribution. For since