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 that distinction as an instrument of social analysis. Comte, according to his plan of pushing forward the ideas of each of the fundamental sciences into the succeeding, had taken up the distinction in abstract mechanics, and carried it first into biology, where it made his contrast between anatomy and physiology—structure and function. The next step was to sociology, and led to the distinction of order and progress. I confess that I never thought the three cases exactly parallel; still, however the distinction came, it was invaluable in sociology; and Comte's separation of the two interests—social order and social progress—was a grand simplification of the subject, and a mighty advance upon the historical and political philosophy of his predecessors and contemporaries. The social statics he discussed briefly, as compared with the magnitude of the topics, but indicated well enough what these topics were; the social dynamics enabled him to give free scope to his doctrine of the Three Stages, and carry this out in a grand survey of the historical development of mankind. Here, of course, he exposed a wide front to criticism; but, while numerous exceptions might be taken to his interpretations of history, it was truly wonderful to see how many facts seemed to fall in happily under his formulas. Mill, it will be seen from the "Logic" (book vi., chapter x.), accepted the Three Stages as an essential part of Comte's historical method, which method he also adopts and expounds as the completion of the logic of sociology. In our very first conversations, I remember how much he regretted Comte's misappreciation of Protestantism; and he strove in the early part of their correspondence to make him see this. He also endeavored to put him right on the specialty of England in the political evolution.

It is curious to observe that his altered estimate of Comte never extended to the views appropriated from him on the method of social science. The modifications in the later editions consisted mainly in leaving out the high-pitched compliments to Comte in the first; none of the quotations are interfered with. I give a few examples of these omissions. Referring to the latest edition, the eighth, on page 490, he writes: "The only thinker who, with a competent knowledge of scientific methods in general"; in the first edition—"The greatest living authority on scientific methods in general." On page 506, line five from bottom, before "To prove (in short)," the first edition has—"It is therefore well said of M. Comte." In page 512, line thirteen from top, the words "but deem them" are followed in the first edition by "with the single exception of M. Comte." In page 513, line nine from top, after "up to the present time," a long sentence of reference to Comte is left out. In page 530, line fourteen from top, after "attempting to characterize," there is omitted the clause—"but which hitherto are to my knowledge exemplified nowhere but in the writings of M. Comte."

The distinction of statics and dynamics was carried by Mill into