The board of county commissioners shall give thirty days' notice of the election upon the question of issuing said bonds, by publication in two weekly newspapers of general circulation published at the county seat of the county, unless there be but one weekly newspaper, in which event that one shall be sufficient; and if there be no weekly newspaper, then by five notices posted in five public places within the county. The notices of election shall contain the statement of the county commissioners, as provided by the preceding section,¹ date of election, amount of bonds proposed to be issued and whether for courthouse or jail or for both courthouse and jail. The notices shall be signed by the chairman of the board of county commissioners and attested by the county clerk.