Note 109 — Chapter VII · THE EMPIRICAL THEORY AS DEVELOPED BY MALTHUS.
Reading edition
In his Principles, 1st ed., 1820, and 2d ed., 1836, which was considerably altered from the first. The Measure of Value Stated and Illustrated, a pamphlet of 1823, and the Definitions in Political Economy may be mentioned, but the text of the two editions of the Principles suffices for any except the most minute investigation of his views.