In recent years some makers of these dowsing devices have attempted to cross over from treasure hunting to the areas of contraband detection, search and rescue, and law enforcement.
I can't even find that anybody has surveyed it geophysically, for example with ground-penetrating radar, though archaeological dowsing might produce equally good results.
The instruments and methods that the couple employed in their mineral exploration have led to his being associated with dowsing, astrology and alchemy.
Effective lice removal thus always comes down to dowsing the head with oil and meticulously combing with a special tool to pick out all remaining nits, strand by strand.