On the seventh day after the election, at 8 o'clock p.m., the returns having been made to the board of trustees, the board shall meet and canvass the returns, and if it appears that more than one-half of the votes cast at the election are in favor of issuing the bonds, then the board shall cause an entry of the fact to be made upon its minutes and shall certify to the board of supervisors, all the proceedings had in the premises. Thereupon the board of supervisors shall issue the bonds of the district, to the number and amount provided in the proceedings, payable out of the building fund of the district, naming the district.