Royal College of Physicians Act, 1761

The quantities of every ingredient in any recipe or prescription shall be written in words at length,

penalty 40s.

>XIX. And in order to prevent the incertainties and dangers, which may attend the setting down the quantities of medicines in chemical and numeral characters in prescriptions; be it enacted by the authority aforesaid, That every physician, chirurgeon, or other person or persons, who now do or hereafter shall take upon him or them to prescribe internal or external remedies for the health of man's body in this kingdom, shall hereafter write or set down the quantity or quantities of all and every medicine or ingredient, whether simple or compound, which he or they shall prescribe in any recipe, formula, or prescription, in words at length, and not in chemical or numeral characters, under the penalty of forty shillings for every such omission.