CHAP. 32.—GEODES; THREE REMEDIES.

Geodes[1] is so called from its formation, it containing earth within. It is remarkably beneficial for the eyes, and is used for the cure of diseases of the testes and mamillæ.

1. "Earthy" stone. These are either nodules of iron-stone, hollow in the centre, or else round, inorganic masses, hollow, and lined with crystals within. These latter are mostly of a silicious nature.