20 Powers and Privileges of the House. The House of Commons possesses the power of expelling members for offences calculated to bring discredit upon Parliament : such offences are forgery, fraud, corruption, and other offences against the House itself. Contempts against the authority of the House, whether by members or others, can be punished by the House of Commons, which exercises the power of committing persons to prison for any such offences as disobedience of its orders ; indignities offered by libellous reflections upon the House; interference with or libels against individual members. Members are not liable, for any language used in Parliament, to the ordinary tribunals, but only to the House itself. No member can be detained by any civil process while going to, attending, or returning from the House ; but these rules do not extend to protect members against a criminal process. The Business of the House. The House is presided over by a member chosen by the House of Commons and approved by the Crown. He is called the Speaker. His duties are to keep order, decide all disputed points of procedure, regulate the order in which members address the House, and supervise the voting of the House. If votes are equal in any case, he gives the casting vote, but otherwise he does not vote. The Speaker generally holds office from Parlia-