Royal College of Physicians Act, 1761

Not to tinsel over or disguise, or mix medicines with brass or copper preparations, called Dutch metal, &c.

penalty 40s.

>XXII. And for the better preventing the dangerous and destructive practice of tinselling, or covering, or otherwise disguising electuaries, bolus, pills, or other medicines, with unwholsome metallick leaves, or powders, be it enacted by the authority aforesaid, That no apothecary, chemist, druggist, or other person or persons, who now do or hereafter shall prepare, administer, sell, or expose to sale, or keep for that purpose, any drugs, simple or compound medicine, chemical or other medicinal preparation, shall henceforth presume to tinsel over, cover, or otherwise disguise, or mix with any electuary, bolus, pill, powder, or other drug or medicine, any leaves, powders, or other preparations of copper or brass, called Dutch metal, Dutch leaves, or Dutch gold, or under whatsoever denomination they may be known or called, under the penalty of forty shillings sterling for every such offence.