It was over such a circle of learned men and _beaux-esprits_ that Mr. Jefferson was called to preside, when he came to Philadelphia, in 1797, to act as Vice-President of the United States in an uncongenial Federal administration. It is not strange that, with his scholarly and scientific tastes, he found in the rooms of the Philosophical Society a grateful retreat from political wrangling and the cares of state. Party feeling ran so high, at this period, that “social intercourse between members of the two parties ceased,” says Mr. Parton, “and old friends crossed the street to avoid saluting one another. Jefferson declined invitations to ordinary social gatherings, and spent his leisure hours in the circle that met in the rooms of the Philosophical Society.” Not that its membership was Republican, many of its prominent members being Federalists; notably, Dr. Benjamin Rush, Chief Justice Tilghman, Judge Peters, Jared Ingersoll, who was Federalist candidate for the Vice-Presidency of the United States in 1812, Dr. Robert Patterson, and Mr. Du Ponceau. This was a place, however, where science, art, and literature occupied the ground and where politics and party differences were forgotten in the discussion of some subject that touched the general weal, as when Dr. Caspar Wistar discovered a new bone; or Robert Patterson presented a paper on improved ship-pumps; or Jonathan Williams one on a new mode of refining sugar; or when John Fitch exhibited “the model, with a drawing and description, of a machine for working a boat against the stream by means of a steam-engine;” or, later, when Mr. Charles Goodyear was induced, by Franklin Peale, to demonstrate to the society that vulcanized rubber could be made from the juice of the _cahuchu_ tree. And here, as if to prove that science and religion may be allied in closest union, came two distinguished Moravian divines, John Heckewelder and the Rev. Lewis D. de Schweinitz, the latter with his “_Synopsis Fungorum in America_.” John Adams, the Federalist President, was a member of the Philosophical Society, and speaks of it with warm admiration. Comparing Massachusetts and Pennsylvania, he says, in one of his letters to his wife,--