As Sea-farers, that Valuable and Useful Part of Mankind, have many Hardships and Difficulties to contend with, so it is of great Importance to obviat… - Stephen Hales

It is hoped, that the Light given by these Researches, may be of use in skilful Hands, for regulating and adapting the due Proportions of the acid, and the oily Principles, to different Cases and Constitutions. This is the proper Province of the Physician, which I am no ways qualified to meddle in.

The bodies which I distilled... (Fig. 38.) were Horn, calculus humanus, Oystershell, Oak, Mustard seed, Indian-wheat, se, Tobacco, oil of Anniseed, oil of Olives, Honey, Wax, Sugar, , , Earth, Walton Mineral, sea Salt, Salt-petre, Tartar, Sal Tartar, , Minium.

When Tar-waters of different Degrees of Strength were put into Florence Flasks, with other inverted Flasks fixed on them, and all were placed in the same Vessel of hot Water; on breaking the upper Flasks, the volatile acid Spirit could very sensibly be tasted, especially that of the stronger Tar-water; which shows that these Waters are impregnated therewith: and which when distilled from Turpentine, Dr. Boerhaave in his Chemistry says, is the best vegetable Acid that is known.