Most of the schools in the city of New York and vicinity, and some other cities, hold two sessions a day. The reasons they give for this course are, that teachers have not time faithfully to make the deep, permanent impression on the hearts of their pupils in one session that they think is necessary; that they cannot do justice to themselves, the children, or the lesson; that no thorough system of teaching can be carried out with one session; that the schools with one session, as a general rule, have only a struggling, lingering existence, and that neither pupils nor teachers will consent to return from two, to one session a day. With two sessions, they say, they have time to go over, _finish_, and _apply_ the lesson, hear the enforcement or illustrations of the superintendent, and several times sing their sweet songs of Zion. Besides, they find their rest in the hearty service. Change from the Sabbath-school to a sermon is a relief, and change is rest. So that faithful, earnest teachers very rarely complain of too much labor or fatigue. Every church and school, however, determines this question for itself. _Constitution and By-Laws._ Sunday-schools usually adopt a few plain rules to govern them; we therefore give a simple form: ART. 1. This Sabbath-school is connected with the ---- Church, or shall be called the ---- Sabbath-school. ART. 2. It shall consist of a Superintendent, a Secretary, a Librarian, and as many teachers and scholars as may be duly received and appointed. The usual duties will be assigned to the different officers of the school. ART. 3. This school shall open at ---- o'clock in the morning, and ---- o'clock in the afternoon, and each session shall continue one hour and ----. ART. 4. On the first ---- of January, or July ----, the terms for which all the officers are elected each year shall expire, and the teachers shall proceed by ballot, at such time, to elect new officers, or to re-elect the old ones. ART. 5. Strict order shall be observed, and all the rules conformed to, by every one connected with the school, and no one shall leave the room until the close of the school, without permission. ART. 6. The annual meeting, or anniversary, shall be held in the month of ----, at which time reports for the year shall be made, and an address by the pastor, or some other person who may be invited. Quarterly meetings for business, and weekly meetings for mutual assistance and counsel, and for the study of the lesson, shall be held by the teachers and officers. ART. 7. This Constitution may be amended at any annual meeting, and By-Laws may be made or amended at any quarterly meeting, by a majority of all the teachers.