"An Oration Delivered February 24, 1775 before the American Philosophical Society, held at Philadelphia, for Promoting Useful Knowledge. By David Rittenhouse, A.M. Member of the said Society." (Printed by John Dunlap, in Market-Street Philadelphia 1775); decorative 19th century binding signed "Hopkinson" inside front cover and O. (Oliver) Hopkinson (1812 - 1905) in the same hand on the title page. "To the Delegates of the Thirteen United Colonies, assembled in Congress at Philadelphia; to whom the Future Liberties, and consequently the Virtue, Improvement in Science and Happiness, of America, are intrusted: The Following Oration is inscribed and dedicated, by their most obedient and humble servant, The Author." Total of 27 numbered pages, highly rare and significant title. From the Francis Hopkinson Family Archives