This Acid in Tar-water will curdle Milk; yet Turpentine-water will not... which shows that Tar is considerably acidulated, by the action of Fire in m… - Stephen Hales

And in his Letter to Baron Wasenberg, Envoy from the King of Sweden, dated the 22d of April 1743... he says, "that every Swedish Man of War, and Hospital Ship, was last Year furnished with one of my Engines; which had not been done, in case so they had not experienced the Benefit of the same, the Campaign so before that." So that a Trial was made with these Ventilators in the Year 1741, which proved a very sickly Summer in the Swedish Fleet, except only in the Ship or Ships, which were refreshed by Ventilators: A strong Instance of their great Usefulness; which induced the Swedes to put them into every Man of War and Hospital-Ship, the rear following.

There is no doubt but it will fully answer your Lordships tender Care and Concern for the Welfare of Navigators, as it will contribute much to their Health, by supplying them, in exchange for a very noxious, with Plenty of fresh Air, that genuine Cordial of Life: For that wonderful Fluid the Air, which, by infinite Combinations with natural Bodies, produces surprizing Effects, as it is on the one Hand when pure, the chief Nourisher and Preserver of the Life of Animals and Vegetables; so, when foul and putrid, it is the great Principle of their Destruction.

But whereas in some Cases, it is observed by Physicians to be too inflammatory, it is probable, that heating Quality, may in some Degree be abated, by making Tar-Water with the Strainer... without Stirring; thereby to divest the Water of a good Quantity of its grosser, tarrish Particles, and yet retain whatever Powers it may have to do good.