ˌoʊvɚ ðə nˈɛkst sˈɛntʃɚɹi vˈɛɹiəs pɹəpˈoʊzəlz wɜː mˌeɪd ʌntˈɪl ðə jˈuːɚɹəl ɹˈɪvɚ pɹɪvˈeɪld ɪnðə mˈɪd nˈaɪntiːnθ sˈɛntʃɚɹi.
Over the next century various proposals were made until the Ural River prevailed in the mid-19th century.