236.42  If election adverse, no second election within 6 months.--If the result of the said election shall be adverse to the issuance of said bonds, no election shall be held for such purpose within 6 months thereafter; except, however, in the event such election shall result or shall have resulted in an equal number of votes being cast for the issuance of said bonds as shall be cast adverse to issuance of bonds, the school board may call and order another or second election within said district to have determined the question of whether the bonds specified in the original petition and resolution shall be issued by said district, after giving notice as provided for by s. 236.39, and it shall not be necessary to have presented to said school board further petitions to order said second election.