1. Rules to be observed by masters and pilots of vessels, arriving at the port of Philadelphia: established by the health law, and regulations of the Board of Health, to which is annexed, a supplement to the health law, passed on the 2d day of April, 1821 Author(s): Pennsylvania. General Assembly. Publication: Philadelphia : Printed by Jacob Frick & Co., 1821 Subject(s): Quarantine -- legislation & jurisprudencePublic HealthShipsPennsylvania
