Page "Le Sage's theory of gravitation" Paragraph 3

With a second object B present, however, a fraction of the particles that would otherwise have struck A from the direction of B is intercepted, so B works as a shield, i. e. from the direction of B, A will be struck by fewer particles than from the opposite direction.

Likewise B will be struck by fewer particles from the direction of A than from the opposite direction.

One can say that A and B are " shadowing " each other, and the two bodies are pushed toward each other by the resulting imbalance of forces ( P2 ).

Thus the apparent attraction between bodies is, according to this theory, actually a diminished push from the direction of other bodies, so the theory is sometimes called push gravity or shadow gravity, although it is more widely referred to as Lesage gravity.