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 that our ideas, or conceptions, are rightly conformable to the nature, properties, and relations, of the objects of which we think; to see how that which is complex may be resolved into its elements, and that which is simple may enter into combination; to observe how that which is consequent may be traced to its cause, and that which is regular be taught by rule; to learn from the custom of speech the proper connexion between words and ideas, so as to give to the former a just application, to the latter an adequate expression, and to things a just description; to have that penetration which discerns what terms, ideas, or things, are definable, and therefore capable of being taught, and what must be left to the teaching of nature: these are the essential qualifications for him who would form good definitions; these are the elements of that accuracy and comprehensiveness of thought, to which allusion has been made, and which are characteristic of "the first and highest philosophy."

3. Again, with reference to the cultivation of the mind, I would add: To observe accurately the appearances of things, and the significations of words; to learn first principles first, and proceed onward in such a manner that every new truth may help to enlighten and strengthen the understanding; and thus to comprehend gradually, according to our capacity, whatsoever may be brought within the scope of human intellect:--to do these things, I say, is, to ascend by sure steps, so far as we may, from the simplest elements of science--which, in fact, are our own, original, undefinable notices of things--towards the very topmost height of human wisdom and knowledge. The ancient saying, that truth lies hid, or in the bottom of a well, must not be taken without qualification; for "the first and highest philosophy" has many principles which even a child may understand. These several suggestions, the first of which the Baron de Puffendorf thought not unworthy to introduce his great work on the Law of Nature and of Nations, the reader, if he please, may bear in mind, as he peruses the following digest of the laws and usages of speech.

4. "Definitions," says Duncan, in his Elements of Logic, "are intended to make known the meaning of words standing for complex ideas;[65] and were we always careful to form those ideas exactly in our minds, and copy our definitions from that appearance, much of the confusion and obscurity complained of in languages might be prevented."--P. 70. Again he says: "The writings of the mathematicians are a clear proof, how much the advancement of human knowledge depends upon a right use of definitions."--P. 72. Mathematical science has been supposed to be, in its own nature, that which is best calculated to develop and strengthen the reasoning faculty; but, as speech is emphatically the discourse of reason, I am persuaded, that had the grammarians been equally clear and logical in their instructions, their science would never have been accounted inferior in this respect. Grammar is perhaps the most comprehensive of all studies; but it is chiefly owing to the unskillfulness of instructors, and to the errors and defects of the systems in use, that it is commonly regarded as the most dry and difficult.

5. "Poor Scaliger (who well knew what a definition should be) from his own melancholy experience exclaimed--Nihil infelicius grammatico definitore! Nothing is more unhappy than the grammatical definer."--Tooke's Diversions, Vol. i, p. 238. Nor do our later teachers appear to have been more fortunate in this matter. A majority of all the definitions and rules contained in the great multitude of English grammars which I have examined, are, in some respect or other, erroneous. The nature of their multitudinous faults, I must in general leave to the discernment of the reader, except the passages be such as may be suitably selected for examples of false syntax. Enough, however, will be exhibited, in the course of this volume, to make the foregoing allegation credible; and of the rest a more accurate judgement may perhaps be formed, when they shall have been compared with what this work will present as substitutes. The importance of giving correct definitions to