But the work of the Association and its officers has not stopped with the _Alumnus_. The local alumni bodies and the class organizations form important links between the graduate and his alma mater, and the sentimental ties, as well as the altruistic spirit engendered by these associations have a vital significance for the individual graduate and for the University. Practically every class that leaves the University is organized for the purpose of perpetuating its college associations and many of the classes, particularly the earlier ones, have published extensive class-books and directories. Every effort is made to return to the University for reunions at stated periods, especially on the twenty-five and fifty year anniversaries. For some years also many classes have followed a plan which brings four classes that were in college together back for a reunion at the same time. The value of these annual home-comings has always been emphasized by the Alumni Association, and so successful has it been in making the reunion season interesting and stimulating that the graduates return in great numbers, sometimes in a carnival spirit, and sometimes, as during the recent war years, with a sense of consecration and devotion. Thus it was easy to pass from the gay fun of a burlesque commencement in Hill Auditorium, which was the feature of one reunion season, to the commemoration of Dr. Angell's life and services in 1916, and the great patriotic meetings of 1918 and 1919, which struck the deepest chords of alumni sentiment.