Mix well in a tumbler a yolk of egg and a teaspoonful of sugar; then add
a few drops of orange-flower water (_eau de fleur d'oranger_); pour
boiling water on the whole, little by little, stirring the while, and
drink warm.
The quantity of water is according to taste.
A gill of water to a yolk of egg makes it thick enough.
It makes an excellent drink, to be taken just before retiring, for
persons with cough.