The clerk of the county court of each county shall provide poll books, a list of all precincts within the county, tally sheets, ballot boxes, voting booths, registration records and forms, strong and durable envelopes upon which to make returns, blank forms for certifying returns and whatever further supplies are needed for holding the elections and making the returns thereof. The poll books shall bear upon each page the following heading: "Names of persons voting at precinct No. …… in the District of ………………….. in the county of …………………. on this (the) …………….. day of …………….. in the year …….." Such poll books shall have columns headed respectively: "Number of Voters," "Signature of Voter" and "Challenge of Voter", and shall have under the heading "Number of Voters" numbers in consecutive order to the bottom of each page. Forms for oaths of commissioners of election and poll clerks shall be written or printed on the poll books. Each ballot box shall be provided with two locks with different keys so that the key for one lock will not open the other and shall be so constructed as to be safely and securely closed and locked, with an opening in the lid of the box sufficient only for the passage of a single ballot.