  In this work, the experiment is discussed on the verification of the
principle of universality of gravitational interactions and some related
problems of gravity theory and physics of elementary particles. The meaning of
this proposal lies in the fact that the self-consistency of General Relativity,
as it turns out, presuppose the existence of the nongravitating form of energy.
Theory predicts that electrons are particles that transfer the nongravitating
form of energy.
