OF THE VITAL AND in the mouth of a hungry perfon: certain ideas excited in the mind are the occafion of a flow of tears from the lachrymal veflels : and the breaft of a nurfe begins to give milk when a child is brought only near it. The extraordinary motions of the veflels of thofe parts cannot in any other way be Recounted for, than by aferibing them to the mind $ of whofe aélion, however, we are no ways con- feious. Further, fince, in confequence of certain ideas being excited in the mind, the flomach is immediately affedled with a naufea and vomiting, it cannot be denied that this is owing to an increafed action of the nervous influence, by means of the mind, upon the mufcular fibres of this organ ; yet we are not more fenfihle of an exertion of the mind in this cafe, than we are when vomiting is ex¬ cited by a dofe of ipecacuanha or emetic tartar. The want of con- feioufnefs, therefore, can be no good argument againfl the motion of the flomach, whether natural or perverted, being produced by the adtlve power or energy of the fendent principle, which is va~ rioufly affedied by the different ßiniuli applied to the delicate nerves of that organ ; and if the idea, only, of a difagreeable fenfation in the flomach can occafion, through the influence of the mind, the motions of vomiting, why fhould not the real fenfation in it more remarkably affedl the mind, and fo excite it to produce the fame motions ? What has been faid with regard to the motions of the flomach, may readily be applied to thofe of the heart : for no fooner are cer¬ tain ideas prefented to the mind, than the motion of the heart is in¬ creafed and accelerated ; which muft, therefore, I fhould think, be the effedl of an extraordinary a&ion of the nervous power on its fibres confequent upon the emotion raffed in the foul : yet of this effort of the mind we are not in any degree confcious. If, there¬ fore, the mind can thus influence the motion of the heart, whilfl we are not fenfible of its power being directed to that end, it feems not unreafonable to fuppofe, that theßimulus of the returning blood may excite the fentient principle to bring the heart into contraction, although we are not confcious of any fuch exertion of its power. But