Among the Greeks, this national appellation has a singular form, as an undeclinable word, of which many fanciful etymologies have been suggested. I have perused, with pleasure and profit, a dissertation de Origine Russorum (Comment. Academ. Petropolitanae, tom. viii. p. 388 - 436) by Theophilus Sigefrid Bayer, a learned German, who spent his life and labours in the service of Russia. A geographical tract of D'Anville, de l'Empire de Russie, son Origine, et ses Accroissemens (Paris, 1772, in 12mo), has likewise been of use.