American science must have been in a condition of encouraging activity between 1750 and 1767, for in those years there were no less than three societies in Philadelphia whose aims and pursuits were in the main identical,--the promotion of useful knowledge and the drawing together of its votaries. These societies were a second Junto, of which the indefatigable Dr. Franklin was a member, the American Philosophical Society, and the American Society. This division in the ranks of science probably arose from the feeling existing between the adherents of the Penn family and those averse to them; these parties being as violently opposed to each other as were, later, Federalist and Democratic-Republican; or, still later, the Whig and Democratic parties. Happily for the historian, who is sadly confused by Juntos and Juntolings, and by American Societies which were philosophical, and Philosophical Societies which were also American, these different bodies showed a disposition to unite, and in 1769 were incorporated into one society, under the title of American Philosophical Society, held at Philadelphia, for Promoting Useful Knowledge. This title proving a trifle “unhandy for every-day use,” to borrow the phraseology of a patriotic farmer’s wife, who bestowed upon one of her offspring the entire heading of the Republican ticket in 1860, “Abraham Lincoln Hannibal Hamlin,” it has gradually been abbreviated into the American Philosophical Society, there being now no other. Of this united society Dr. Franklin was elected president, the first of an honorable line of presidents, whose portraits adorn the walls of the old rooms on Fifth Street, where the philosophers met more than a hundred years ago. The society obtained a grant of land from the State of Pennsylvania in 1785, and in 1787 its hall was completed, the one still used, in whose sunshiny rooms are now gathered the relics, the treasures, and the memories of a century. Here is the old chair on whose broad arm Jefferson wrote the Declaration, and here are autograph letters and autographs of such value as to fill the soul of the collector with “envy, hatred, and malice, and all uncharitableness.” On one side of the hall is the well-known and most characteristic portrait of Dr. Franklin,[23] in his blue coat, large wig, and spectacles, while near by is his marble effigy by Houdon, whose statue of Washington bears the proud inscription, “_Fait par Houdon, citoyen Français._”