It is therefore certain that _Tobacco_ is possessed of an highly penetrating Quality. Thus the celebrated _Heurnius_, in _Lib. 1. Method. ad Prax._ speaks of it in the following Manner: "_Tobacco_, when smoaked, produces very singular Effects, since it draws a surprizing Quantity of Phlegm from the Mouth and Nostrils: The Smoak arising from its dry Leaves laid upon live Coals, when received into the Mouth by a Funnel, pervades the whole Brain, and is also conveyed to the Ears, and _Uterus_. But I can affirm, that this Herb is, in a peculiar Manner, appropriated to the Brain; easily conveys its Virtues thither, and evacuates all its _Sordes_: For, about a Year ago, when I was afflicted with the Tooth-ach, I made a Decoction of _Tobacco_ with Water, adding some _Camomile_ Flowers: A Spoonful of this Decoction, when tepid, I put in my Mouth, and spit it out some Time after; and this I did for two Hours; by which Means my Pain was considerably alleviated. Next Day, when I went to my Garden, and stooped to pull up a Weed, a large Quantity of a Saffron-coloured Liquor, which smelled like _Tobacco_, flowed from my Nose, upon which my Tooth-ach was immediately removed. During the whole of my Life, neither Blood, nor any other Liquor, except a ferous Phlegm, had flowed from my Nose, but upon this Occasion I never saw any Liquor of a deeper yellow Colour." Other similar Accounts of the penetrating Quality of _Tobacco_, I have had from my old Master, _Henningus Arnesæus_, Physician to _Christianus_, the fourth King of _Denmark_, who affirmed, "That not only the Smoak of _Tobacco_, but also that of every other Substance received by the Mouth, was penetrating on Account of its Acrimony; in Consequence of which, it must pervade and alter the whole Substance of the Brain, both _Meninges_, and all the Vessels, and Contents of them." Besides, as the Smoak of _Tobacco_ is hot, proceeding immediately from kindled _Tobacco_; and as, according to _Aristotle_, it is the Property of Heat to collect homogeneous, and separate heterogeneous Substances, it must necessarily happen, in the very Nature of Things, that this Smoak should fuse and colliquate the Phlegm, the Receptacle of which is the Brain, which, according to _Hippocrates_, is the largest of all the Glands. I do not in the least doubt of the Truth of _Arnesæus_'s Opinion; for I think that all the Fore-runners of Catarrhs, such as Sternutations, Spittings, and Discharges of Saliva, are produced by Heat, which is the necessary Cause of Catarrhs, though not the productive Cause of the morbific Matter. Thus the celebrated _Hoffman_, in _Lib. 3. Institut. Medic. Cap. 193._ informs us, "That Heat alone, and, for the most part, of the external Kind, such as that of the Sun, or that procured by Exercise, Wine, and Aromatics, among which are _Cinnamon_ and _Saffron_, with which we so plentifully season our Aliments, is sufficient to fuse and colliquate the Phlegm, or acrid Serum." Thus a Pipe filled with the burned Wicks of Candles, gathered out of Snuffers, or with a Piece of Match used in discharging Cannons, or with a Piece of bituminous, fossile Earth, especially that of _Holland_, will procure as copious a Spitting, as a Pipe of the best _Virginian_ Tobacco. Soldiers also, and Sailors, produce the same Pleasure and Effects in themselves by smoaking kindled Paper, as are produced by smoaking _Tobacco_. Since, therefore, acrid Smoak and Heat of every Kind, conveyed to the Brain, fuse the Phlegm, and eliminate it by the _Os Ethmoides_ and _Sphœnoides_, the Nose and the Palate of the Mouth, I see no Reason why _Heurnius_ should affirm, "That it has a surprizing Faculty of drawing the Phlegm from the Mouth and Nostrils; that it is peculiarly adapted to the Brain, easily conveys its Virtues thither, and eliminates all its Sordes."