In each county with a population of more than 70,000 and less than 100,000, as determined by the 1940 federal census, to assist the court in the transaction of its judicial business, a majority of the judges of the superior court for such county may appoint as many regular official phonographic reporters as necessary to report the proceedings in the court. The number of reporters so appointed shall not exceed at any one time the number of offices of judge provided by law for the court. The reporters shall hold office during the pleasure of a majority of the judges of said court.