Some believe this substance emanates from a medium during a seance
The word Seance comes from French seance, 'seat', 'session', from Old 
French ... As a medium I can tell you that spirits can be kind and loving and help 
heal ... degrees of intensity, which appear in dark rooms, where no substances 
exist,... [DOC] [TLE] 12 Weird Vintage Pictures From Sances | Mental Floss [PAR] Oct 26, 2014 ...