The liquorice root is to be boiled in eight times its weight of
water, to one half; the liquor is then to be expressed, and, after
the fæces have subsided, to be filtered; it is then to be evaporated,
with a heat between 200° and 212°, until it becomes thickish; and,
lastly, it is to be evaporated with a heat less than 200°, and
frequently stirred, until it acquire a consistence proper for forming
pills. This is made into little pastilles, or flat cakes, often
bearing the impression of the places where they are made; and a bit
now and then put into the mouth, takes off the tickling of a cough.
It should be sucked to make it pleasant, as much of the juice taken
at a time is unpleasant.