Under this clause in the original Constitution there were four elections: Washington (two terms), John Adams and Jefferson. The last election (Jefferson) brought on a contest that resulted in the Twelfth Amendment of the Constitution. It will be noticed that the original clause did not require the electors to name the person they voted for as President and the person voted for as Vice-President; they were simply to vote for two persons. On counting the electoral votes as a result of the election of 1800, it was found that Thomas Jefferson, of Virginia, and Aaron Burr, of New York, had an equal electoral vote--73. This threw the election into the House, and a bitter contest followed, which resulted in the victory of Jefferson, making Burr Vice-President; and the curious situation was present of an aspirant to the presidency occupying the subordinate position of Vice-President. To correct this evil, the Twelfth Amendment was proposed, ratified by a sufficient number of States, and went into effect in 1804, and has governed the presidential elections to this day. This amendment provides that the electors, instead of voting for two candidates for President, shall distinctly name in their ballots the person voted for as President and the person voted for as Vice-President. The certificates of the ballots are opened by the President of the Senate in the presence of the Senate and the House. If no person have a majority, then the House chooses the President, each State having one vote. The person having the greatest number of votes as Vice-President shall be Vice-President. But if no person has a majority, then the Senate chooses the Vice-President. But no person constitutionally ineligible to the office of President is eligible to the vice-presidency. Since the Jefferson-Burr contest there has been but one election by the House of Representatives, that of 1824, when none of the candidates having received a majority of the electoral vote, the House, between Andrew Jackson, John Q. Adams and William H. Crawford, selected John Q. Adams as President. John Q. Adams was a son of John Adams, the second President, and this has been the only time in the history of the nation that father and son have occupied the Presidential chair. There has been but one instance of an election of a Vice-President by the Senate, that of R. M. Johnston, in 1837.