Each house is judge of the elections, qualifications, and returns of its own members; determines its own rules of procedure, and may punish its members for disorderly behaviour, or by a two thirds vote expel a member. Absent members may be compelled under penalties to attend. Each house is required to keep a journal of its proceedings and at proper intervals to publish it, except such parts as for reasons of public policy had better be kept secret. At the request of one fifth of the members present, the yeas and nays must be entered on the journal. During the session of Congress neither house may, without consent of the other, adjourn for more than three days, or to any other place than that in which Congress is sitting. [Sidenote: Privileges of members.] Senators and representatives receive a salary fixed by law, and as they are federal functionaries they are paid from the federal treasury. In all cases, except treason or felony or breach of the peace, they are privileged from arrest during their attendance in Congress, as also while on their way to it and while returning home; "and for any speech or debate in either house they shall not be questioned in any other place." These provisions are reminiscences of the evil days when the king strove to interfere, by fair means or foul, with free speech in parliament; and they are important enough to be incorporated in the supreme law of the land. No person can at the same time hold any civil office under the United States government and be a member of either house of Congress. [Sidenote: The Speaker.] The vice-president is the presiding officer of the Senate, with power to vote only in case of a tie. The House of Representatives elects its presiding officer, who is called the Speaker. In the early history of the House of Commons, its presiding officer was naturally enough its _spokesman_. He could speak for it in addressing the crown. Henry of Keighley thus addressed the crown in 1301, and there were other instances during that century, until in 1376 the title of Speaker was definitely given to Sir Thomas Hungerford, and from that date the list is unbroken. The title was given to the presiding officers of the American colonial assemblies, and thence it passed on to the state and federal legislatures. The Speaker presides over the debates, puts the question, and decides points of order. He also appoints the committees of the House of Representatives, and as the initiatory work in our legislation is now so largely done by the committees, this makes him the most powerful officer of the government except the President.