on the discovery of water

"In magnifying the art of discovering mines and springs, and the skill required for this purpose, she [the baroness, in the "restitution of Pluto"] gives a description of the means employed, showing that these hidden treasures are to be detected, (1) by digging, which is the least important way, (2) by the herbs and plants which grow above streams of water, (3) by the taste of the waters which flow from them, (4) by the vapors which arise from them at sunrise, and (5) by the use of 16 scientific instruments and 7 rods [the 7 rods of Basilius Valentinus] connected with the 7 planets,"