Mr. Ricardo's Principles of Political Economy consisted in the second edition of thirty-one chapters, to which, in the third edition, was added another, making thirty-two. These thirty-two chapters fall into the following classification:--Fourteen are on the subject of Taxation, namely, the eighth to the eighteenth, [Footnote: The eleventh is on Tithes; and the eighteenth on Poor Rates; but these of course belong to the subject of Taxation properly defined. The present Lord Chancellor (late Earl of Eldon) said on some cause which came before him about a year ago, that Tithes were unjustly called a Tax; meaning only that Tithes were not any arbitrary imposition of the government, but claimed by as good a tenure as any other sort of property. In this doctrine no doubt the Chancellor was perfectly right; and only wrong in supposing that any denial of that doctrine is implied by the Political Economists in calling Tithes a Tax; which, on the true definition of a Tax (as I shall show hereafter), they certainly are.] inclusively, the twenty- second, twenty-third, and twenty-ninth; and these may be entirely omitted by the student, and ought at any rate to be omitted on his first examination of the work. For, though Mr. Ricardo has really been not the chief so much as the sole author of any important truths on the subject of Taxation, and though his fourteen chapters on that head are so many inestimable corollaries from his general doctrines, and could never have been obtained without them, yet these general doctrines have no sort of reciprocal dependency upon what concerns Taxation. Consequently, it will greatly lighten the burden to a student if these fourteen chapters are sequestered from the rest of the work, and reserved for a separate and after investigation, which may furnish a commentary on the first. The chapters on Taxation deducted, there remain, therefore, seventeen in the second edition, or eighteen in the third. These contain the general principles, but also something more-- which may furnish matter for a second subtraction. For, in most speculations of this nature it usually happens that, over and above the direct positive communication of new truths, a writer finds it expedient (or, perhaps, necessary in some cases, in order to clear the ground for himself) to address part of his efforts to the task of meeting the existing errors; hence arises a division of his work into the doctrinal or _affirmative_ part, and the polemic [Footnote: _Polemic_.--There is an occasional tendency in the use and practice of the English language capriciously to limit the use of certain words. Thus, for instance, the word _condign_ is used only in connection with the word _punishment_; the word _implicit_ is used only (unless by scholars, like Milton) in connection with _faith_, or _confidence_. So also _putative_ is restricted most absurdly to the one sole word, _father_, in a question of doubtful affiliation. These and other words,