An Act to make perpetual several Laws relating to the Encouragement of the Silk Manufactures; to the allowing the Importation of Rape Seed, and other Seeds used for extracting Oil, whenever the Prices of middling British Rape Seed shall be above a certain Limit; to the encouraging the Growth of Coffee in His Majesty's Plantations in America; and for amending and making perpetual several Laws relating to the preventing the clandestine running of Goods, and the Danger of Infection thereby; and to the allowing the Importation of Seal Skins cured with Foreign Salt free of Duty.