The title has already declared, that these volumes are particularly intended for the use of schools, and, therefore, it has been the care of the authors to explain the several sciences, of which they have treated, in the most familiar manner; for the mind, used only to common expressions, and inaccurate ideas, does not suddenly conform itself to scholastick modes of reasoning, or conceive the nice distinctions of a subtile philosophy, and may be properly initiated in speculative studies by an introduction like this, in which the grossness of vulgar conception is avoided, without the observation of metaphysical exactness.  It is observed, that in the course of the natural world no change is instantaneous, but all its vicissitudes are gradual and slow; the motions of intellect proceed in the like imperceptible progression, and proper degrees of transition from one study to another are, therefore, necessary; but let it not be charged upon the writers of this book, that they intended to exhibit more than the dawn of knowledge, or pretended to raise in the mind any nobler product than the blossoms of science, which more powerful institutions may ripen into fruit.

For this reason it must not be expected, that in the following pages should be found a complete circle of the sciences; or that any authors, now deservedly esteemed, should be rejected to make way for what is here offered.  It was intended by the means of these precepts, not to deck the mind with ornaments, but to protect it from nakedness; not to enrich it with affluence, but to supply it with necessaries.  The inquiry, therefore, was not what degrees of knowledge are desirable, but what are in most stations of life indispensably required; and the choice was determined, not by the splendour of any part of literature, but by the extent of its use, and the inconvenience which its neglect was likely to produce.

1.  The prevalence of this consideration appears in the first part, which is appropriated to the humble purposes of teaching to read, and speak, and write letters; an attempt of little magnificence, but in which no man needs to blush for having employed his time, if honour be estimated by use.  For precepts of this kind, however neglected, extend their importance as far as men are found who communicate their thoughts one to another; they are equally useful to the highest and the lowest; they may often contribute to make ignorance less inelegant; and may it not be observed, that they are frequently wanted for the embellishment even of learning?

In order to show the proper use of this part, which consists of various exemplifications of such differences of style as require correspondent diversities of pronunciation, it will be proper to inform the scholar, that there are, in general, three forms of style, each of which demands its particular mode of elocution:  the familiar, the solemn, and the pathetick.  That in the familiar, he that reads is only to talk with