An enquiry into the original, nature, power, order and communion, of evangelical churches : With the true nature of a gospel-church, and its government. Wherein these following particulars are distinctly handled, I. The subject matter of the church. II. The formal cause of a particular church. III. Of the polity, rule or discipline of the church in general. IV. The officers of the church. V. The duty of pastors of churches. VI. The office of teachers in the church. VII. Of the rule of the church, or of the ruling elders. VIII. The nature of church-polity or rule, with the duty of elders. IX. Of deacons. X. Of excommunication. XI. Of the communion of churches. By the late pious and learned minister of the gospel, John Owen, D.D.