Connected alike with physical and intellectual education, is the practice of measuring by the eye heights, distances, superfices, weights, and solids.  It is not difficult to train the eye to an accuracy in this matter which would astonish the uninstructed.

SEC. 3. Tasting and Smelling.

I do not know that it is worth our while to take pains, by any direct methods, to cultivate the organs of taste or smell; but I think it proper, at the least, to preserve their original rectitude.

Many, I know, undertake to say, that were it not for our errors in regard to food and drink, and were it not, in particular, for the multitude of strange mixtures which tend to benumb those two senses, we might determine the qualities of food and drink—­whether they are favorable or adverse—­by means of taste and smell, like the animals.  But I do not believe this.  The Creator has substituted reason, in us, for instinct in the brute animals.  It is not necessary that we should possess the latter, when the former is so manifestly superior to it; and accordingly I do not believe that it is given us, or any of that acuteness of sensation which exists in the dog, the tiger, the vulture, &c.—­and which so closely resembles it.

There can be no doubt—­no reasonable doubt, certainly—­that the wretched customs of modern cookery benumb the senses of taste and smell, more or less, and that high-seasoned food, condiments, and stimulating drinks do the same; and should for this reason, were it for no other, be studiously avoided.

Closely connected with the organ of taste are the TEETH.  A volume might profitably be written on these—­as on the eye.  But I will only say that they should be kept perfectly clean, either by rinsing or brushing, or both, especially after eating; that they should be permitted to chew all our food, instead of merely standing by as silent spectators to the passage of that which is mashed, soaked, chopped, &c.; that they should not be picked or cleaned with pins, or other equally hard instruments; that they should not be used to crack nuts or other hard, indigestible substances; and that the stomach, with which they are apt to sympathize very strongly, should also be kept in a good and healthy condition.

SEC. 4. Feeling.

Corpulence and slovenliness are generally among the more prolific sources of a want of acuteness in feeling.  The first is a disease, and may be avoided by a proper diet, and by active mental and bodily employment.  Slovenliness we may of course avoid, whenever there is a wish to do so, and an abundance of water.

But the sense of feeling, or especially that accumulation of it which we call TOUCH, and which seems to be specially located in the balls of the fingers and on the palm of the hand, is susceptible of a degree of improvement far beyond what would be the natural result of cleanliness, and freedom from plethora or corpulence.