It is by no means the object of this little work to set people to watching their stomachs from meal to meal, in regard to the effects of food, drink, &c.; for nothing in the world is better calculated to make dyspeptics than this. It is true, indeed, that some things may be obviously and greatly injurious, taken only once; and when they are so, they should be avoided. But in general, it is the effect of a habitual use of certain things for a long time together--and the longer the experiment the better--which we are to observe. A book to guide mothers in the formation of early good habits in their offspring, should be the result of long observation and much experiment on these points, but more especially of a thorough understanding of human physiology. It should not consist so much of the conceits of a single brain--perhaps half turned--as of the logical deductions of severe science, and facts gleaned from the world's history. Here is a nation, or tribe of men, bringing up children to certain habits, from generation to generation--and such and such is their character. Here, again, is another large portion of our race, who, under similar circumstances of climate, &c. &c., have, for several hundred years, educated their children very differently, and with different results. A comparison of things on a large scale, together with a close attention to the constitution and relations of the human system, affords ground for drawing conclusions which are or may be useful. If this book shall not afford light derived from such sources, it were far better that it had never been written. If it only sets people to watching over the effects of things taken or used only for a single day, instead of leading them from early infancy to form in their children such habits as will preclude, in a great measure, the necessity of watching ourselves daily, then let the day perish from the memory of the writer, in which the plan of bringing it forth to the world was conceived. But he is confident of better things. He does not believe that a work which, to such an extent, GIVES THE REASON WHY, will be productive of more evil than good. On the contrary, it must, if read, have the opposite effect.