This book is an attempt to set for the basic processes of expository writing in a form that will be intelligible and helpful to first-year students. It is designed to cover the work of the first half year or the first two quarters in colleges and universities where considerable attention is given to exposition. This book is in two parts. In the introductory discussion the qualities aimed for are simplicity, conciseness, and definiteness. The illustrative material are works that exemplify the topics discussed in the first part.