Early American imprints. Series I, Supplement from the Library Company of Philadelphia, 1670-1800 provides access to the holdings of the Library Company of Philadelphia to include a broad range of recently uncovered books, pamphlets, broadsides, and U.S. House and Senate Bills and Resolutions. This resource offers nearly 1,000 rare and unique items printed during a 130-year period spanning the colonial era and the formation of the new nation.