Mr. Tesla was charmed to hear about the Vedantic prana and akasha and the kalpas. He thinks he can demonstrate mathematically that force and matter are reducible to potential energy. I am to go to see him next week to get this mathematical demonstration. In that case Vedantic cosmology will be placed on the surest of foundations. I clearly see their perfect union with modern science, and the elucidation of one will be followed by that of the other.