At least 30 days before the time of holding any election at which the question mentioned in the preceding section shall be submitted to a vote of the electors, the clerk of the village shall give public notice of the time and place of holding such election; and that the question whether the village shall be incorporated as a city of the fourth class under the provisions of this act, will be submitted to vote at the election. Such notice shall be given by posting written or printed copies thereof in 10 of the most public places in the village, and by publishing the same in 1 or more newspapers published in the village, the same length of time before such election.