Front Page Titles (by Subject) ADVERTISEMENT TO THE SIXTH EDITION. - An Essay on the Principle of Population, vol. 1 [1826, 6th ed.]
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ADVERTISEMENT TO THE SIXTH EDITION. - Thomas Robert Malthus, An Essay on the Principle of Population, vol. 1 [1826, 6th ed.] 
An Essay on the Principle of Population, or a View of its Past and Present Effects on Human Happiness; with an Inquiry into our Prospects respecting the Future Removal or Mitigation of the Evils which it Occasions (London: John Murray 1826). 6th ed.
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ADVERTISEMENT TO THE SIXTH EDITION.
Jan. 2d, 1826.
The additions to the present edition chiefly consist of some further documents and inferences relating to the state of the population in those countries, in which fresh enumerations, and registers of births, deaths and marriages, have appeared since the publication of my last edition in 1817. They refer principally to England, France, Sweden, Russia, Prussia, and America, and will be found in the chapters which treat of the population of these countries. In the chapter on the Fruitfulness of Marriages an additional table has been given, (vol. i. p. 498.) which, from the per centage increase of population in the interval between those decennial enumerations which are now taking place in some countries, shews the period of their doubling, or the rate at which they are increasing. At the end of the Appendix my reasons for not replying to the late publication of Mr. Godwin are shortly stated. In other parts of the work some inconsiderable alterations and corrections have been made which it is unnecessary to specify; and a few notes have been added, the principal of which is one on the variations in the price of corn in Holland under a free trade, and the error of supposing that the scarcity of one country is generally counterbalanced by the plenty of some other.—Vol. ii. p. 207.