The Edinburgh lectures soon bore fruit. On the death of Mr. Loudon, Professor of Logic in Glasgow College, in 1750, Smith was appointed to the vacant chair, and so began that period of thirteen years of active academic work which he always looked back upon, he tells us, "as by far the most useful and therefore by far the happiest and most honourable period" of his life. The appointment lay with the Senatus--or, more strictly, with a section of the Senatus known as the Faculty Professors--some of whom, of course, had been his own teachers ten years before, and knew him well; and the minutes state that the choice was unanimous. He was elected on the 9th of January 1751, and was admitted to the office on the 16th, after reading a dissertation _De origine idearum_, signing the Westminster Confession of Faith before the Presbytery of Glasgow, and taking the usual oath _De fideli_ to the University authorities; but he did not begin work till the opening of the next session in October. His engagements in Edinburgh did not permit of his undertaking his duties in Glasgow earlier, and his classes were accordingly conducted, with the sanction of the Senatus, by Dr. Hercules Lindsay, the Professor of Jurisprudence, as his substitute, from the beginning of January till the end of June. During this interval Smith went through to Glasgow repeatedly to attend meetings of the Senatus, but he does not appear to have given any lectures to the students. If he was relieved of his duties in the summer, however, he worked double tides during the winter, for besides the work of his own class, he undertook to carry on at the same time the work of Professor Craigie of the Moral Philosophy chair, who was laid aside by ill health, and indeed died a few weeks after the commencement of the session. This double burden was no doubt alleviated by the circumstance that he was able in both the class-rooms to make very considerable use of the courses of lectures he had already delivered in Edinburgh. By the traditional distribution of academic subjects in the Scotch universities, the province of the chair of Logic included rhetoric and belles-lettres, and the province of the chair of Moral Philosophy included jurisprudence and politics, and as Smith had lectured in Edinburgh both on rhetoric and belles-lettres and on jurisprudence and politics, he naturally took those branches for the subjects of his lectures this first session at Glasgow. Professor John Millar, the author of the _Historical View of the English Government_ and other works of great merit, was a member of Smith's logic class that year, having been induced, by the high reputation the new professor brought with him from Edinburgh, to take out the class a second time, although he had already completed his university curriculum; and Millar states that most of the session was occupied with "the delivery of a system of rhetoric and belles-lettres." In respect to the other class,