The effects of the physical scalar on the three reactions, $e^{+}{e}^{-}\to {\mu }^{+}{\mu }^{-}$, $e^{\pm }{e}^{-}\to e^{\pm }{e}^{-}$, are calculated in the Georgi-Glashow theory. A relation is found between the contribution of the scalar to these cross sections and the mass of the heavy lepton which can be used to completely test the theory, regardless of the masses of the particles, and without resorting to experiments involving hadrons.

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