Any county or city in the State of Nebraska is hereby authorized to issue bonds to aid in the construction of any railroad or other work of internal improvement in an amount to be determined by the county board of such county or the city council of such city not exceeding three and five-tenths percent of the taxable valuation of all taxable property in the county or city. The county board or city council shall first submit the question of the issuing of such bonds to a vote of the legal voters of the county or city in the manner provided by law for submitting to the people of a county the question of borrowing money.