(6) _Speakers._ A visitor should rarely be invited or allowed to address the school; never, unless the superintendent has sufficient knowledge to be sure that he will speak briefly, interestingly, and pointedly. Before the uniform lesson concentrated the studies of the Sunday school it was the custom to invite almost any visitor to speak to the school; and many were the wrongs inflicted upon the boys and girls in those good old days by dull, loquacious Sunday-school orators. But almost everybody now understands that the Sunday school is a working institution, and its work must not be interrupted. (7) _Self-control._ There will be times when the superintendent will need to be on guard over himself; times when he feels depressed, or melancholy, perhaps a little cross. If he yields to his natural impulses, the school will soon perceive the state of his nerves, and some scholars may even endeavor to add to his trials. At such times, let him watch over himself mightily, and resolve, no matter how he feels, to "keep sweet," to speak gently, and to look cheerful. (8) _The Aim._ Lastly, one purpose should ever stand before the superintendent, and should be the constant object of his endeavor--to lead all his scholars into a personal, vital relation to Jesus as the Christ, to bring them into union with the church, and to inspire them to enter upon active Christian service. VIII THE ASSOCIATE AND DEPARTMENT SUPERINTENDENTS 1. =The Necessity.= In every Sunday school there is need of an officer to aid the superintendent and to take his place when absent. Even in a small school the supervision can be more thorough and the teaching more efficient, if some one is at hand with authority to relieve the superintendent of minor details, and give him freedom for the general management. And in a large school assistants to the superintendent are an absolute necessity, for each department becomes in itself a school. There is need, therefore, of a general assistant to be the chief of staff to the superintendent, and, in a large and well-organized school, of a special assistant in each department. 2. =Titles.= Until recently, the assistant superintendent in most Sunday schools was merely one of the teachers named to take the place of the superintendent when absent, but with no duties when the head of the school was present. In the complete organization that is now becoming general, the office has been renamed, and its functions distinctly assigned. The chief assistant to the superintendent is now generally called the Associate Superintendent, a higher title for his important and regular duties. The chief of each department in the Sunday school is generally called Department Superintendent, that is, Primary Department Superintendent, Senior Department Superintendent; and each department superintendent has the same relation to his department that the associate superintendent holds to the school.