A very large and important part of the extension work of universities, colleges, and departments of education is done through correspondence, thus giving to large numbers of men and women who cannot go to college or attend set courses of lectures an opportunity to profit by well-directed reading and study and by scholarly criticism. The purpose of this bulletin is to report some of the facts concerning the extent of the use of correspondence study instruction by reputable institutions, to describe the educational service thus rendered, and to show how these institutions carry on the work in such a way that its educational value cannot be questioned. (Contain 3 footnotes.) [Best copy available has been provided.]