The legislature shall select its own officers and employees and fix their compensation. Each house shall have one chaplain, one chief clerk and one sergeant at arms; and there shall be one assistant chief clerk and one assistant sergeant at arms for each house; and each house may employ such enrolling clerks, reading clerks, stenographers, janitors and such subordinate employees in addition to those enumerated, as they may reasonably require and their compensation shall be fixed by the said legislature at the beginning of each session. (As amended November 2, 1948.)