The chief need of the teacher of logic in our high-schools and colleges is a text-book which will meet the peculiar requirements of the class room. Many of the text-books now in use are written by men whose theory of the nature and value of knowledge, influenced as it is by false philosophical principles, is distrusted by the teacher who uses the books, and is not unlikely to upset the minds of the pupils. Others, while written on the soundest philosophical princi ples, take little or no account of pedagogical methods, and present the theory of logic with out sufficient regard for the difficulties which beset beginners in this study.