Nikola Tesla (1856–1943) Serbian American inventor
First attibution is to Ralph Bergstresser who claims to have heard this from Tesla in a conversation "following an experience with the Maharaja's son". <br class="br">Disputed <br class="br">Source: Coments From The Inventor of the Purple Harmony Plates http://www.bibliotecapleyades.net/ciencia/esp_ciencia_universalenergy02.htm,