"It is a question which involves fine distinctions, which some may regard as unsatisfactory... the question is one of construction. Where the power is conferred on a court, there will ordinarily be a strong presumption that the court as such is intended. Where the power is conferred on a judge, rather than on a court, it will be a question whether the distinction was deliberate, and whether the reference to "judge" rather than to "court" indicates that the power was intended to be invested in the judge as an individual who, because he is a judge, possesses the necessary qualifications to exercise it."