PUTATIVE PERCEPTION OF ROTATING PERMANENT MAGNETIC-FIELDS FOLLOWING INGESTION OF LSD

While sitting alone in complete darkness, 3 participants who had inges ted psychotropic concentrations of lysergic acid diethylamide reported diffuse of white, purplish, or greenish-yellow lights as two horsesho e magnets rotated at 0.5 Hz. The experiences were not reported when th e magnets were stationary or removed from the apparatus. The estimated peak-to-peak variation in field strength at the distance of perceptio n was between 50 and 500 nanoTesla. An association between these resul ts and possible ergot-induced perceptions of ''magnet light'' reported during the last century by von Reichenbach (1851) is suggested.