The original veto power in Illinois was vested in a council of revision, consisting of the governor and the justices of the supreme court, whose function was limited to a preview of legislative acts for the purpose of making recommendations in regard to their constitutionality. Practical difficulties hampered the effective operation of this council, especially the inability of justices to perform adequately their two sets of diverse duties. The constitutional convention of 1848 found it expedient, therefore, to reform the constitutional mandate of veto by concentrating the function in the governor.