Whenever it shall become necessary, under the provisions of this act, to submit to a vote of the electors of any county, the question of raising any sum of money by loan or by tax, the said board, after having determined the sum necessary to be raised, whether the same shall be made by loan or by tax, shall proceed to give the notice of such determination, and of the time when the question will be submitted to the electors of such county in the several townships, which notice shall be for the same length of time and posted in the same manner as required by the eighteenth section of this act; and the votes shall be taken, canvassed, certified and returned, in the same manner as required by the nineteenth section of this act, except that those voting for such tax or loan shall have written or printed on their ballots the words “for the tax,” or “for the loan,” as the case may be; and those voting against the tax or loan, shall have written or printed on their ballots, the words “against the tax,” or “against the loan,” as the case may be.