The fuppofed gloominess of necefity refuted. Origin of doctrinal neceffity. Concije bistory, and jummary, of Manichæifm. Methods more gros Manichæans than Manes himjelf. Remarkable converfation-pieces of three modern philojo- phizers. The Westminster and other offemblies of divines vindicated. Arminianifm itself, when bard prhed, com- pelled to take refuge in neceffity. Conclufion of this Essay