An Act to continue several laws for the encouragement of the making of sail cloth in Great Britain, and of the silk manufactures of this kingdom : and for allowing a drawback on the exportation of copper bars imported; and to explain a clause of an Act made in the last session of Parliament, to prohibit the exportation of corn, and other things therein mentioned; and to give further time for the payment of duties omitted to be paid for the indentures and contracts of clerks and apprentices.