Here and there is found a man possessing a pebble for which he claims the remarkable power of preventing hydrophobia when applied to the wound made by a mad dog. We have been unable to find any record of a scientific examination of a mad stone or a scientific test of its properties. This may be partly accounted for by the rarity of the stone, and the high esteem in which they are held by their owners. A popular idea is that they are formed by accretion in a deer's stomach.
Proceedings of the Iowa Academy of Sciences
©1895 Iowa Academy of Science, Inc.
Hall, T. Proctor and Frisk, Ernest E.
"A Mad Stone,"
Proceedings of the Iowa Academy of Science, 3(1), 45-47.
Available at: https://scholarworks.uni.edu/pias/vol3/iss1/12