Upon Inquiry from knowing Persons, I find that Norway or Swedish Tar, which is dark, thick and clear... is accounted the best for the general Uses...… - Stephen Hales

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Upon Inquiry from knowing Persons, I find that Norway or Swedish Tar, which is dark, thick and clear... is accounted the best for the general Uses... But that the Tar which is made of the Tops of -Trees... having lain long dead... after having either fallen... or being killed by the draining off their Sap... (These Tops are commonly called Light-wood, the poorer People making use of them instead of Candles:) This Tar being burned in a very strong Fire of such dry Wood, is of a very caustick, corroding Nature, so as to be hurtful to Ropes, &c. for which reason it is not used in the Royal Navy. But the American Tar, which is made of green Fir-Trees, with a less degree of Fire, is esteemed good, and is called green Tar...

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About Stephen Hales

(September 17, 1677- January 4, 1761) was an English clergyman whose inventions, studies and experiments made major contributions to developments in botany, and in both plant and animal . He was the first to measure utilizing his "Hales Manometer", and also invented a to distill various "airs" i.e., gases. His other medical or health related inventions include a ventillation bellow to improve air quality in enclosed spaces, and surgical for the removal of s. He was a philanthropist and wrote a popular tract on alcoholic intemperance.

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Additional quotes by Stephen Hales

We have from the foregoing Experiments many proofs of the very great and different quantities of moisture imbibed and perspired by different kinds of Trees, and also of the influence of the several states of the air, as to warm or cold, wet or dry, have on that perspiration. We see also what stores of moisture nature has provided in the Earth against a dry season, to answer this great expence of it in the production and support of vegetables; how far the dew can contribute to this supply, and how insufficient its small quantity is towards making good the great demands of perspiration: And that plants can plentifully imbibe moisture thro' their stems and leaves as well as perspire it.

Man, not contented with the Liquors, which his bountiful Creator intending for his Comfort, has wisely tempered with such a due Proportion of Strength, as would (if taken in Moderation,) make his Heart glad, has unhappily found Means to extract, from what God provided for his Refreshment, a most intoxicating and baneful Spirit, to which, in a great measure, is owing the remarkable Increase of Drunkenness of late Years; which Vice reigns to a most enormous Degree, among the habitual Drinkers of Gin, Brandy, and other Distilled Liquors; which are found to be most pernicious and destructive. For at the same shat they coagulate and thicken the Blood, they also contract and narrow the Blood-Vesels; which has, in fact, been found to be true, by Experiments I have purposely made with Brandy, on the Blood and Blood-Vesels of Animals.

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