Thus far I have considered this provision in the light of authorities already known and recognized at the adoption of the National Constitution. This is enough; for it is by these authorities that its meaning must be determined. You cannot reject these without setting at defiance a fixed rule of interpretation, and resorting instead to vague inference or mere imagination, quickened, perhaps, by your desires. Mere imagination and vague inference, quickened, perhaps, by your desires, are out of place when Parliamentary Law is beyond all question. Pardon me, if I protract this argument by an additional illustration, derived from our own Congressional history. This is found under the parallel provision of the National Constitution relating to the Vice-President, which, after much debate in another generation, received authoritative interpretation: “The Vice-President of the United States shall be _President of the Senate_, but shall have no vote, unless they be equally divided.” In other words, the Vice-President, like the Chief Justice, shall _preside_ in the Senate, but, unlike the Chief Justice, with a casting vote. His general powers are all implied in the provision that he shall preside. No question has occurred with regard to the vote of the Vice-President, for this is expressly regulated by the National Constitution. But the other powers of the Vice-President, when presiding in the Senate, are left to Parliamentary Law and express rules. Some of the latter were settled at an early day. From the rules of the Senate at the beginning it appears, that, independent of his casting vote, nothing was originally recognized as belonging to a _presiding_ Vice-President beyond his power to occupy the chair. All else was determined by the rules. For instance, Senators, when speaking, are to address the Chair. This rule, which seems to us so superfluous, was adopted 16th April, 1789, early in the session of the first Congress, in order to change the existing Parliamentary Law, under which a member of the upper House of Parliament habitually addresses his associates, and never the Chair. Down to this day, in England, a peer rising to speak says, “My Lords,” and never “My Lord Chancellor,” although the latter _presides_. Another rule, adopted at the same date, has a similar origin. By Parliamentary Law, in the upper House of Parliament, when two members rise at the same time, the House, by their cry, indicate who shall speak. This was set aside by a positive rule of the Senate that in such a case “the President shall name the person to speak.” The Parliamentary Law, that the presiding officer, whether a member or not a member, shall put the question, was reinforced by an express rule that “all questions shall be put by the President of the Senate.”