The question arises whether an author 18 not in a false position who, it must be confessed, cannot even under stand most books on philosophy, and yet who enters the lists Of philosophical discussion. The justification, if it amount to one, is this: that many people are in like case. They are interested in philosophical problems that present themselves in the course Of daily life; they think and talk about these things, but turning to books for enlightenment, find most writers on philosophy above their heads. It is this section Of the reading public whom the author aspires to address. Her own interest in logic was kindled early in the century by the works of John Stuart Mill, and by the teaching Of Miss E. E. Constance Jones.