1. =Necessity.= The aspiration for advancement is natural and noble; and therefore every member of the Sunday school who is interested in its welfare, whether officer, teacher, or pupil, desires it to increase in membership, and to spread its benefits as widely as possible. But the recruiting of the Sunday school is not only desirable, but necessary. It is found that in every school there exists an outflow as well as an inflow of members. If in certain departments, as the Primary, new scholars are constantly enrolled, in other departments, as the older grades of the Intermediate and the Senior, there is as constant a dropping out of members from the school. It has been estimated that in most Sunday schools from twenty to twenty-five per cent of the membership changes annually, so that the average period of a teacher or scholar in the Sunday school is less than five years. There are some who remain longer, but others who are members for even a shorter time. Upon the average, every school is a new school once in four or five years. If one fifth of the school leaves every year, there must be an equal number enter it, to keep the school at its normal size. But any institution dependent upon the maintenance of a constituency, whether it be a periodical, a life-insurance association, or a Sunday school, begins to decline when its number remains stationary. The health and life of the school, therefore, require a constant renewal of its membership. The school must have new blood, or it will soon be impoverished and in time die. 2. =The Losses from the School.= Before the presentation of plans for winning new scholars comes the vital question of holding the scholars already on the roll; for the condition of leakage has a close relation to growth or decline. If the causes of the leakage can be ascertained, and the drain can be stopped, we shall be materially aided in our effort to enlarge the school.