The lawfulness and expediency of set forms of prayer, maintained, I. From the Old Testament. II. From the New Testament. III. From the Practice of the Universal Church. IV. From the Advantages of this way of Worship. V. From the Disadvantages of Extemporizing. VI. From the Sentiments of the Learned Presbyterians, Foreign and British. Vii. From the Weakness of the Objections against Set Forms in General, and the English Service in Particular. By the Rev. Mr. Robert Calder, of the Church of Scotland. And by the Rev. Bishops Taylor, Comber and King of the Church of England.