or IRBITSKAIA, a town of Russia, in the government of Perm, on the river Irbit, and the frontiers of Siberia. It is noted for a yearly market held in January, the season for travelling on the ice, and is an entrepot for Siberian furs, and other arctic merchandise passing into Europe. The annual fair is frequented by Russians and Siberians, Tartars, Armenians, and Greeks. Near it is a large iron work, which yields nearly 2000 tons of iron a year. It is 142 miles north-east of Ekaterinenburg. Long. 62. 50. E. Lat. 57. 35. N.