Eye Water

Table salt and white vitriol, of each, 1 table-spoon; heat them upon copper or earthen until dry; the heating drives off the acrid or biting water, called the water of crystallization, making them much milder in their action; now add them to soft water 1/2 pt.; putting in white sugar 1 table-spoon; blue vitriol a piece the size of a common pea. If it should prove too strong in any case, add a little more soft water to a vial of it. Apply it to the eyes 3 or 4 times daily.

Source: Dr Chase's Recipes, or Information for Everybody, A.W. Chase