Prior to each primary and election each county board of election shall prepare full instructions for the guidance of electors in districts in which ballots are used, and also similar instructions for the guidance of electors in districts in which voting machines are used, and they shall cause the same, together with such portions of this act as deemed advisable, to be printed in large clear type on separate cards to be called cards of instruction. They shall also prepare blank forms of oaths of election officers, records of assisted voters, affidavits of challenged electors and others, general and duplicate return sheets, tally papers, statements, blank forms for numbered lists of voters, with sufficient space for noting their party enrollment at primaries, notice of penalties for the information of electors and election officers, and other forms and supplies required by this act for use in each election district of the county. Said forms, blank books, and other supplies shall have printed thereon appropriate instructions. In districts in which voting machines are used the general and duplicate return sheets and statement shall be printed to conform to the type of voting machine sued in such districts and the designating number and letter, if any, on the counter for each candidate shall be printed thereon opposite the candidate's name.