Pennyroyal Water.
Take of pennyroyal leaves, dried, a pound and a half; water, from a gallon and a half to two gallons. Draw off by distillation one gallon.
This water possesses, in a considerable degree, the smell, taste, and virtues of the plant. It is given in mixtures and juleps to hysteric patients.
An infusion of the herb in boiling water answers nearly the same purposes.
William Buchan
Domestic Medicine 2nd edition 1785