Hydromancy

Hydromancy (Ancient Greek ὑδρομαντεία, water-divination, from ὕδωρ, water, and μαντεία, devination ) is a method of divination by means of water, including the color, ebb and flow, or ripples produced by pebbles dropped in a pool.

The Jesuit M. A. Del Rio (1551–1608) described several methods of hydromancy. The first method described depicts a ring hanging by a string that is dipped into a vessel of water which was shaken. A judgment or prediction is made by the number of times which the ring strikes the sides of the vessel.