Why is a free electron not repelled into the sky by the earth E-field? The electromagnetic theory of gravitation

As everyone knows, Braun's cathode ray tubes (e.g., “old TVs”) work and free electrons at low velocity are not rejected into sky. This simple observation is not self-evident at all because the electron is an absolutely highly negatively charged (q = 1e) particle and possesses only a small amount of mass (m = m_e ). In terms of these data and regarding to the Earth's E-field, one would expect that the electron is rejected from earth fast and strongly. It will be shown here that taking the new physical quantity z into account and extending the mass charge unification to the gravitational and electric field will lead to an easy explanation of this well known physical phenomenon. There by an electromagnetic theory of gravitation is presented.