The exportation, however, of the instruments of trade, properly so called, is commonly restrained, not by high duties, but by absolute prohibitions. Thus, by the 7th and 8th of William III chap.20, sect.8, the exportation of frames or engines for knitting gloves or stockings, is prohibited, under the penalty, not only of the forfeiture of such frames or engines, so exported, or attempted to be exported, but of forty pounds, one half to the king, the other to the person who shall inform or sue for the same. In the same manner, by the 14th Geo. III. chap. 71, the exportation to foreign parts, of any utensils made use of in the cotton, linen, woollen, and silk manufactures, is prohibited under the penalty, not only of the forfeiture of such utensils, but of two hundred pounds, to be paid by the person who shall offend in this manner; and likewise of two hundred pounds, to be paid by the master of the ship, who shall knowingly suffer such utensils to be loaded on board his ship.
When such heavy penalties were imposed upon the exportation of the dead instruments of trade, it could not well be expected that the living instrument, the artificer, should be allowed to go free. Accordingly, by the 5th Geo. I. chap. 27,