Archives for posts tagged ‘medieval’

Martine Bertereau

Martine Bertereau, Baroness de Beausoleil, 1600-1642 – an early mining engineer and mineralologist, was said to find mineral ore deposits by a range of techniques including dowsing. Her writings describe the use of 7 divining or dowsing rods of different metals and a minerological compass to determine the presence of different ores.