Summary of text [comment] page 83

[Here, the potential of the source of the specular scattering_1V is has little to do with the potentials inherent in me_1H, except to say that the thing may attract my eye₂.

Also, the thought experiment_3H may easily be replaced with the term “nature and source of illumination_3H” or (more evocatively) “mirror of the world_3H”.]