This so-called galactite, which enjoyed such an extraordinary reputation in ancient and medieval times, is not, properly speaking, a stone, but a nitrate of lime. The strange and famous relics of the Virgin preserved in many old churches and called “the Virgin’s milk,” were merely solutions of this nitrate. Possibly pieces of this so-called galactite were sometimes found by pilgrims in the grotto of Bethlehem, and were supposed to be petrified milk.[6] As everything in this sacred spot was regarded as connected in some way with the miraculous birth of Christ, it is easy to understand why the devout pilgrims came to believe that the milky-hued substance represented the milk of the Virgin, which had been preserved for future ages in this extraordinary way. A kind of galactite, evidently a finely deposited form of carbonate of lime and perhaps absorbent, is mentioned by Conrad Gesner.[7] This was found on the Pilatus Mountain, Lake Lucerne, and is described by Gesner as being a “fungous and friable” substance, white and exceedingly light in weight. The natives called it _Mondmilch_ (moonmilk) and it was sold in the pharmacies of Lucerne. The powder was used by physicians in the treatment of ulcers, and, like all the other galactites, it was supposed to increase the flow of milk and to develop the breasts. Besides this it was credited with somniferous virtues. An old Mohammedan tradition, cited by Ibn Kadho Shobah in his Tarik al-Jafthi, relates that Noah, after the deluge, on setting out with the members of his family to settle and populate the regions to the eastward and northward of Mt. Ararat, confided to their care a miraculous stone known to the Turks as _jiude-tash_, to the Persians as _senkideh_ and to the Arabs as _hajer al-mathar_, or the “rain-stone.” On it was impressed the word Aadhem or Aazem, the great name of God, by virtue of which whosoever possessed this stone could cause rain to fall whenever he pleased. In the long lapse of time this particular “precious” stone was lost, but some of the Turks were said to have certain stones endowed with a like power, and the more superstitious among these Turks solemnly asseverated that their “rain-stones” could beget progeny by a mysterious kind of generation.[8] Among the many stones or concretions endowed by medieval belief with wonderful powers, may be reckoned the “rain-making” stones. Some of these were to be found in Karmania, south of Khorassan. The miraculous effect was produced by rubbing one against another. The Arabic author who reports this declares that this rain-making power was a well-known fact. He adds that similar stones might be secured from near Toledo in Spain and also in the “land of Kimar,” inhabited by Turkish tribes.[9]