peculiar to itself, as those of _Opium_, _Tobacco_, or _Agnus Castus_ are to them. As the _Agnus Castus_, or _Vitex_ is, by _Galen_, said to be dry in the third Degree, like _Rue_, and to consist of very subtile Parts, it is impossible it should produce Impotence by rendering the Seed cold, which it diminishes and dissipates, not so much by the Subtilty of its Parts, as by its peculiar Sulphur. The incomparable _Hoffman_, both in his _Variæ Lectiones_, and in his Treatise _de Medicamentis Officinalibus_, has treated accurately of the _Vitex_. But, if that Author had been still alive, he would have agreed with me in this, that what _Galen_ ascribes to the Subtilty of the Parts, not only of all Simples, but also of such Things as act by their whole Substance, such as _Opium_, _Tobacco_, _Agnus Castus_, _Chinese Tea_, _European Tea_, or the _Myrtus Brabantica_, or the _Chamelæagnus Danica_, is to be ascribed to their small sulphureous, and excessively dry Parts. Thus the Seeds of the _Agnus Castus_ affect the Head, and from what has been said, it is sufficiently obvious, that the Seeds of the _Chamelæagnus_ contribute principally to intoxicate the Country People, who prepare their Ale with it: The Seeds of the _Agnus Castus_, according to _Hoffman_, "do not convey Flatulences to the Head, except when they affect it by the Subtilty of their Parts (which I call their sulphureous Quality) just as Wine, whose Taste and Smell they have, according to _Pliny_, affects the Head, and procures Sleep." All these Properties of Wine, as well as of our _Chamelæagnus_, proceed from their Sulphur, which is grateful to the Nerves: But these Effects could never be produced, only by _Galen_'s Subtilty of the Parts. But to proceed, in the Words of _Hoffman_: "Another Proof of the Subtilty of the Parts of _Agnus Castus_, (which I call its sulphureous Quality) is, that its Seeds, whether crude, or toasted, discuss Flatulencies of the Intestines, and most powerfully when toasted; since these do not so much affect the Head as the former." Thus, it also happens, that an Account of the artificial and careful Toasting of the _Chinese Tea_, by which most of its sulphureous Parts are dissipated, it prevents Sleep in the _Chinese_: Whereas, the _European Tea_, or _Chamelæagnus_, renders the Country People, as it were, intoxicated, and disposed to Sleep. But these different Effects are not owing to any occult Qualities of the _Chinese_ and _European Teas_, but manifestly to the sulphureous Parts, of which the _Chinese_ has a far smaller Quantity than our _Chamelæagnus_. Thus, it is certain, that prepared _Vipers_ may be safely eaten, and that _Dioscorides_ roasted _Vipers_ for Food; so vast a Difference there is between artificial Preparations, and natural Productions. But to proceed: _Hoffman_, with respect to toasting the Seeds of the _Agnus Castus_, tells us, "That in toasting, the remarkably subtile Parts are dissipated." These remarkably subtile