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A Third Volume (of which the chief materials are already prepared) will comprehend all that I mean to publish under the title of the Philosophy of the Human Mind. The principal subjects allotted for it are Language ; Imitation ; the Varieties of intellectual Character; and the Faculties by which Man is distinguished from the lower animals. The two first of these articles belong, in strict propriety, to this second part of my work; but the size of the volume has prevented me from entering on the consideration of them at present.

The circumstances which have so long delayed the publication of these volumes on the Intellectual Powers, have not operated, in an equal degree, to prevent the prosecution of my inquiries into those principles of Human Nature, to which my attention was, for many years, statedly and forcibly called by my official duty. Much, indeed, still remains to be done in maturing, digesting, and arranging many of the doctrines which I was accustomed to introduce into my lectures ; but if I shall be blessed, for a few years longer, with a moderate share of health and of mental vigour, I do not altogether despair of yet contributing something, in the form of Essays, to fill up the outline which the sanguine imagination of youth encouraged me to conceive, before I had duly measured the magnitude of my undertaking with the time or with the abilities which I could devote to the execution.

The volume which I now publish is more particularly intended for the use of Academical Students; and is offered to them as a guide or assistant, at that important stage of their progress when, the usual course of discipline being completed, an inquisitive mind is naturally led to review its past attainments, and to form plans for its future improvement. In the prosecution of this design, I have not aimed at the establishment of new theories ; far less have I aspired to the invention of any new organ for the discovery of truth. My principal object is to aid my readers in unlearning the scholastic errours, which, in a greater or less degree, still maintain their ground in our most celebrated seats of learning; and by subjecting to free, but, I trust, not sceptical discussion, the more enlightened though discordant systems of modern Logicians, to accustom the understanding to the unfettered exercise of its native capacities. That several of the views opened in the following pages appear to myself original, and of some importance, I will not deny; but the reception these may meet with, I shall regard as a matter of comparative indifference, if my?labours be found useful in training the mind to those habits of reflection on its own operations, which may enable it to superadd to the instructions of the schools, that higher education which no schools can bestow.

22 November, 1813.)

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Section III.-In what respects the study of the Aristotleian Logic may be

useful to disputants.—A general acquaintance with it justly regarded as

an essential accomplishment to those who are liberally educated.-Doubts

suggested by some late writers, concerning Aristotle's claims to the inven-

tion of the Syllogistic Theory


CHAPTER IV.–Of the Method of Inquiry pointed out in the Experimental or

Inductive Logic


Section 1.—Mistakes of the Ancients concerning the proper object of Philo-

phy.—Ideas of Bacon on the same subject.-Inductive Reasoning.-Ana-

lysis and Synthesis.--Essential difference between Legitimate and hypo-

thetical Theories


SECTION II.-Continuation of the Subject. The Induction of Aristotle

compared with that of Bacon


SECTION III.-Of the Import of the Words Analysis and Synthesis, in the

Language of Modern Philosophy


I. Preliminary Observations on the Analysis and Synthesis of

the Greek Geometricians


II. Critical Remarks on the vague Use, among Modern Writers,

of the Terms Analysis and Synthesis


SECTION IV.-The Consideration of the Inductive Logic resumed . 215

1. Additional Remarks on the distinction between Experience

and Analogy.-0f the grounds afforded by the latter for

Scientific Inference and Conjecture


II. Use and Abuse of Hypotheses in Philosophical Inquiries.-

Difference between Gratuitous Hypotheses, and those which

are supported by presumptions suggested by Analogy.-In-

direct Evidence which a Hypothesis may derive from its

agreement with the Phenomena.–Cautions against extend-

ing some of these conclusions to the Philosophy of the Hu-

man Mind


III. Supplemental Observations on the words INDUCTION and

ANALOG Y, as used in Mathematics,


Section V.-Of certain misapplications of the words Experience and Induc-

tion in the phraseology of Modern Science. Ilustrations from Medicine

and from Political Economy


SECTION VI.-Of the Speculation concerning Final Causes


I. Opinion of Lord Bacon on the subject.-Final Causes reject-

ed by Des Cartes, and by the majority of French Philoso-

phers.- Recognised as legitimate Objects of research by

Newton.—Tacitly acknowledged by all as a useful logical

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