pared to the space in normal piling, it appears, even if there are as many positive inequalities as there are negative inequalities, the positive will present no evidence, being scattered, while the negative inequalities being brought together by gravitation, are in evidence.
Besides the positive and negative inequalities, there is another inequality which can easily be conceived.
Whatever may be the cause it is possible to conceive that a number of grains may be removed from one position, in the medium, to another position, the medium being otherwise uniform; thus instituting a complex inequality, as between two inequalities, one positive and the other negative, the number of grains in excess in the one being exactly the same as the number absent in the other.
Such complex inequalities differ fundamentally from the gravitating inequalities, inasmuch as the former involve the absolute displacement of mass, while the latter have no effect on the position of the mean mass in the medium: and in respect of involving absolute displacement of mass, the complex inequality corresponds with electricity.
Apart from the displacement of mass, the
