Depending on the humidity of the atmosphere, visitors can view the mountains of Agio Oros. Meanwhile, Ybor and Agio called upon Frea, Godan's wife. Procurement of that currency involves payment of a premium referred to as agio. Ybor, Agio, and their mother Gambara rejected their demands for tribute. Their ruler was a woman called Gambara, with her sons Ybor and Agio. The Ottoman army advanced to the plain of Agio Pigada (meaning "Holy Well"). Examples are sodium iodate (NaIO), silver iodate (AgIO), and calcium iodate (Ca(IO)). In April 1759 Graumann discussed with Ephraim the old and Mittelfriedrich d'or and the agio. Silver iodate (AgIO) is a light-sensitive, white crystal composed of silver, iodine and oxygen. Because of the above it bore an agio, being worth more than its nominal value. Agio (Italian "aggio") is a term used in commerce for exchange rate, discount or premium.