Fortunately, the peculiar construction of the Senate was found to require a presiding officer who should not be a member of the body itself. As each State was to be represented by two delegates, and as it would be important not to withdraw either of them from active participation in the business of the chamber, a presiding officer was needed who would represent neither of the States. By placing the Vice-President of the United States in this position, he would have a place of dignity and importance, would be at all times conversant with the public interests, and might pass to the chief magistracy, on the occurrence of a vacancy, attended with the public confidence and respect. This arrangement was devised by the grand committee, and was adopted with general consent. It contemplated, also, that the Vice-President, as President of the Senate, should have no vote, unless upon questions on which the Senate should be equally divided; and on account of his relation to this branch of the legislature, the ultimate election of the Vice-President, when the electors had failed to appoint him under the rule prescribed, was retained in the hands of the Senate. The rule that was to determine when the Vice-President was to succeed to the functions of the chief magistrate, was also embraced in the plan of the grand committee. It was apparent that a vacancy in the principal office might occur by death, by resignation, by the effect of inability to discharge its powers and duties, and by the consequences of an impeachment. When either of these events should occur, it was provided that the office should devolve on the Vice-President. In the case of death or resignation of the President, no uncertainty can arise. In a case of impeachment, a judgment of conviction operates as a removal from office. But the grand committee did not provide, and the Constitution does not contain any provision or direction, for ascertaining the case of an inability to discharge the powers and duties of the office. When such an inability is supposed to have occurred, and is not made known by the President himself, how is it to be ascertained? Is there any department of the government that can, with or without a provision of law, proceed to inquire into the capacity of the President, and to pronounce him unable to discharge his powers and duties? What is meant by the Constitution as _inability_ is a case which does not fall within the power of impeachment, for that is confined to treason, bribery, and other high crimes and misdemeanors. It is the case of a simple incapacity, arising from insanity, or ill health, or, as might possibly occur, from restraint of the person of the President by a public enemy. But in the former case, how shadowy are the lines which often separate the sound mind or body from the unsound! Society has had one memorable example, in modern times and in constitutional monarchy, of the delicacy and difficulty of such an inquiry;--an