See Hist. des Huns, tom. ii. p. 296. The Geougen believed that the Huns could excite at pleasure storms of wind and rain. This phenomenon was produced by the stone Gezi, to whose magic power the loss of a battle was ascribed by the Mahometan Tartars of the fourteenth century. See Cherefeddin Ali, Hist. de Timur Bec, tom. i. p. 82, 83.