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Nikola Tesla, who was both an inventor and mathematician, persisted with actual experiments and speculations on wireless transmission of energy that went beyond the physics of the day. This note presents a summary of Tesla’s ideas on wireless transmission to explain his intuition that he could use the capacity of ether to hold and transfer energy. This intuition was related to ākāśa, the Indian concept of ether, on which he communicated with Vivekananda.