Although the dominant mode of technoscientific 'invention' at the turn to the 20th century was based on rationalism it also brought about its flipside of electromagnetic esotericism. Telegraphy and radio triggered a new age of spiritism.Even now, images of Tesla in his laboratory evoke associations with alchemism (Image of Tesla in his laboratory http://www.pbs.org/tesla/ll/images/cs_seated02.jpg); regarding the connection between electromagnetism and spiritualism, cf. Becker 2006 Theaters of Possession, Dangerous Transcommunications [conference talk]. Waves RIX-C: Riga.