6. _Pay attention to the quality and quantity of food taken into the stomach._ I know of nothing else which more necessarily affects both the health of the body, and the vigor of the intellect. It is from this that the blood is formed, and the continual waste of the system supplied. And through the blood it acts on the brain, which is the seat of the intellect. Yet, notwithstanding this, those whose peculiar province it is to direct the preparation of our food, seldom inquire into the chemical effect any such preparation may have upon the stomach, and, through it, upon the whole system. Indeed, the business is generally left to persons entirely ignorant of the principles which govern the human constitution. It is no wonder, then, that a large proportion of the culinary preparations of the present day are decidedly unfriendly to it. But in relation to this matter, I cannot here be very particular. I will only give some general rules, by which you may discover the bounds of moderation, and what articles of food ought to be avoided. The sensible effects arising from food unsuitable to the state of the stomach are generally the following:--Disagreeable eructations, accompanied with risings of food; uneasy or burning sensations of the stomach; acidity; and these symptoms are often succeeded by headache and dizziness or vertigo. The effects of an excessive quantity of food are first felt by an uneasiness and oppressive fulness of the stomach. This is succeeded by a general distension or fulness of the blood-vessels, particularly about the head; general lassitude; sluggishness and dulness of intellect, with a great aversion to mental effort. These sensations are accompanied by a general uneasiness throughout the whole system, with more or less pain. It also brings into exercise every unholy temper. It makes people fretful, impatient, and peevish. The best disposition may be ruined by the improper indulgence of the appetite. I have been particular in describing these symptoms, because people are often subject to many uncomfortable sensations, for which they cannot account, but which might be traced to this source. A large share of our unpleasant feelings probably arises either from the improper quality, or excessive quantity, of the food taken into the stomach. And the bounds of moderation are more frequently exceeded by all classes of people, than many imagine. But for a more full examination of this subject, I must again refer you to the works of judicious writers on health, and the means of preserving it. This is a matter so intimately connected with the sphere of a lady's influence, that every female should give it a thorough investigation.