Autobiography

but the paid contributors continued to be remunerated on the usual scale of the Edinburgh and Quarterly Reviews; and this could not be done from the proceeds of the sale.

In the same year, 1837, and in the midst of these occupations, I resumed the Logic. I had not touched my pen on the subject for five years, having been stopped and brought to a halt on the threshold of Induction. I had gradually discovered that what was mainly wanting, to overcome the difficulties of that branch of the subject, was a comprehensive, and, at the same time, accurate view of the whole circle of physical science, which I feared it would take me a long course of study to acquire; since I knew not of any book, or other guide, that would spread out before me the generalities and processes of the sciences, and I apprehended that I should have no choice but to extract them for myself, as I best could, from the details. Happily for me, Dr. Whewell, early in this year, published his History of the Inductive Sciences. I read it with eagerness, and found in it a considerable approximation to what I wanted. Much, if not most, of the philosophy of the work appeared open to objection; but the materials were there, for my own thoughts to work upon: and the author had given to those materials that first degree of elaboration, which so greatly facilitates and abridges the subsequent labour. I had now obtained what I had been waiting for. Under the impulse given me by the thoughts excited by Dr. Whewell, I read again Sir J. Herschel's Discourse on the Study of Natural Philosophy: and I was able to measure the progress my mind had made, by the great help I now found in this work--though I had read and even reviewed it several years before with little profit. I now set myself vigorously to work out the subject in thought and in writing. The time I bestowed on this had to be stolen from occupations more urgent. I had just two months to spare, at this period, in the intervals of writing for the Review. In these two months I completed the first draft of about a third, the most difficult third, of the book. What I had before written, I estimate at another third, so that one-third remained. What I wrote at this time consisted of the remainder of the doctrine of Reasoning (the theory of Trains of Reasoning, and Demonstrative Science), and the greater part of the Book on Induction. When this was done, I had, as it seemed to me, untied all the really hard knots, and the completion of the book had become only a question of time. Having got thus far, I had to leave off in order to write two articles for the next number of the Review. When these were written, I returned to the subject, and now for the first time fell in with Comte's Cours de Philosophie Positive, or rather with the two volumes of it which were all that had at that time been published. My theory of Induction was substantially completed before I knew of Comte's book; and it is perhaps well that I came to it by a different road from his, since the consequence has been that my treatise contains, what his certainly does not, a reduction of the inductive process to strict rules and to a scientific test, such as the syllogism is for ratiocination. Comte is always precise and profound on the method of investigation, but he does not even attempt any exact definition of the conditions of proof: and his writings show that he never attained a just conception of them. This, however, was specifically the problem, which, in treating of Induction, I had proposed to myself. Nevertheless, I gained much from Comte, with which to enrich my chapters in the subsequent rewriting: and his book was of essential service to me in some of the parts which still remained to be thought out. As his subsequent volumes successively made their appearance, I read them with avidity, but, when he reached the subject of Social Science, with varying feelings. The fourth volume disappointed me: it contained those of his opinions on social subjects with which I most disagree. But the fifth, containing the connected view of history, rekindled all my enthusiasm; which the sixth (or concluding) volume did not materially abate. In a merely logical point of view, the only leading conception for which I am indebted to him is that of the Inverse Deductive Method, as the one chiefly applicable to the complicated subjects of History and Statistics: a process differing from the more common form of the deductive method in this--that instead of arriving at its conclusions by general reasoning, and verifying them by specific experience (as is the natural order in the deductive branches of physical science), it obtains its generalizations by a collation of specific experience, and verifies them by ascertaining whether they are such as would follow from known general principles. This was an idea entirely new to me when I found it in Comte: and but for him I might not soon (if ever) have arrived at it.