There is such a great necessity for adapting each lesson perfectly to the age, acquirements, etc., of the scholar, that I add a single specimen lesson from "The Sunday Teachers' Treasury." It is upon the same subject as that taken up in Mr. Wells's infant-class lesson--"The Passover"--and is given that, by comparison of style, the adaptation of the same lesson to infant and Bible-classes may be seen: _Specimen Lesson for a Senior Class._ _The Feast of the Passover._ (Exodus xii.) Circumstances of the Israelites at this time; how solemn, how stirring, how intense in interest! The institution of the Passover seems to have a threefold design. It was--1. An act of faith and obedience on the part of Israel. 2. A memorial of their deliverance. 3. A type of Christ. In the last view we will study it to-day, looking less closely at those points which we had on a former occasion, and connecting with the actual celebration of the Passover that which God connected with it--the feast of unleavened bread and the offering of the first-fruits of the barley harvest. The Passover, then, was a type of Christ. I. The victim was to be a lamb; and this title is applied to Christ (John i. 29). The first altar exhibits a lamb slain; the first act of God for Israel is the slaying of the lamb; the first deed of the new dispensation was presenting, and then offering, the Lamb; the first opening of the sanctuary above, shows the "Lamb that was slain." 1. Without blemish (Matt. xxvii. 4; 1 Pet. i. 19; Heb. vii. 26). 2. Set apart four days (ver. 3, 6; John xii. 1, 12). 3. Roasted with fire (Isa. liii.; Ps. xxii.; Luke xxii. 44). 4. Not a bone to be broken (John xix. 33). 5. All the congregation were to take part (ver. 6; Matt. xxvi. 1; Acts ii. 23-36). 6. The blood was to be shed and sprinkled. Where? On the side-post and upper door-post; not on the floor, where it would be trampled on (compare 1 Pet. i. 19; Heb. x. 29). It is not enough that Christ's blood is shed; it must be sprinkled on our hearts (Heb. xii. 24; 1 Pet. i. 2). The act of sprinkling it upon the door-posts was equivalent to a profession, "I am the Lord's." It was the means of safety, "When _I see the blood_," etc.