to itself, that when it appears half withered, it emits no Smell; but sends forth a strong one when gently rubbed between the Hands; for if it should be bruised, the Labour would be lost. _Rue_ also contains so volatile a Sulphur, that, when it is dry, it has almost no Colour, whilst its Seeds are oleous and sulphureous. _Wormwood_ holds a Kind of Medium, consisting of one highly volatile Principle, which greatly affects the Head; for which Reason some would have it washed in warm Water before it is used for the Preparation of the _Vinum Absinthites_, and another of a more fixed Nature; as also a volatile and fixed Salt: Thus, also, _Garlick, Mother of Thyme_, and especially the _Laurel_, abound in Sulphur, as well as the _Chamelæagnus_, in which, indeed, it is more slowly and difficultly consumed, than in the others. When, in order to investigate the Virtues and Faculties of the _Chamelæagnus_, I kindled some Part of it, together with the Seeds; it did not burn suddenly, like the _Juniper_, but slowly, like the _Beech_, with certain Noises, or Kinds of Explosions, intermixed. The Smoak, which filled the whole Laboratory, was of an acrid Smell, highly resembling that of the kindled Twigs of the _Beech_: Hence, we infer, that the _Chamelæagnus_ contains a large Quantity of Sulphur and volatile Salt. From these Reasonings and Experiments, I think it is sufficiently obvious, that it is, upon account of the grateful and duly corrected Sulphur of the _Chinese Chamelæagnus_, that the Brain is so much refreshed, and that Persons who use it in _China_, can, without any Loss, sit up whole Nights in transacting Business; a memorable Instance of this we have in _Alexander Rhodius_, who always had Disorders of his Head removed by drinking it: Whereas, the _European Chamelæagnus_, especially that which is full grown, and abounds with Seeds and Flowers, when boiled in Ale, intoxicates those who drink such Ale, procures Sleep, and excites Head-achs. These Circumstances, when impartially weighed, will vindicate me from Partiality, when I despise the costly _Chinese Chamelæagnus_, and, in its stead, substitute our own, a Shrub of uncommon and excellent Qualities against Poison, and the Bites of Serpents: Since, according to _Pliny_, these noxious Animals cannot endure the Smell of it. These Virtues of the _Chamelæagnus_, we can teach the _Asiatics_, but can hardly believe that, by Virtue of their _Tea_, Persons may sit up all Night, without sustaining any Loss.