The summations of years for the Dynasties XII.
Brandis assigned 258 years to the 3rd dynasty; other summations have been proposed with equally little assurance of certainty.
If we have a continuous distribution of matter, instead of a system of discrete particles, the summations in (6) are to be replaced by integrations.
In the case of continuous distributions of matter the summations in (9), (10), (II) are of course to be replaced by integrations.
Where (X, Y, Z) and (L, M, N) are the forceand coupleconstituents of the system of extraneous forces, referred to 0 as base, and the summations extend over all the mass-elements of the system.