The text-book, however good, and the lecturer, however able, are only one of two necessary factors in College work, the reciprocal element is the students’ activity. Unless the students are actively engaged not simply in taking in what they are told, but in rearranging it, turning it over, trying and testing it, they are doing little good. We recognize this quite abundantly in the laboratory nowadays, but we neglect it enormously in the more theoretical study of a subject. The facts of a subject if it is a science may be got at in the most thorough way by handling in the laboratory, but the ideas of a subject must be handled in discussion, reproduction and dispute. Examinations, examinations by teachers who understand this very fine art, in which the student is obliged to restate, apply, and use the principles of his subject, are of the utmost value in keeping the mind active and not simply receptive. They are just as good and as vitally necessary as examination papers which merely demand definitions and lists and bald facts are bad. And then there might be discussions--if the Professor were clever enough to conduct them. If the students of a class could be induced to submit propositions for discussion, from which a topic could be selected, and could then be made to prepare for a disputation to which all would have to contribute, with the Professor as a controlling influence in the chair to check facts and logic and to conclude, it would have the value of a dozen lectures. But Professors who are under the burthen of perhaps ninety or a hundred lectures a year cannot be expected to do anything of this sort. Directed reading, conferences on knotty points, special lectures followed by the questioning of the lecturer, discussions upon matters of opinion, laboratory work when needful, fairly frequent test examinations, and a final examination for places, are the proper ingredients of a good modern College course, and in the necessity of leaving the Professor’s energies free for the direction of all this really educational work, lies another reason for that complete, explicit, well-arranged text-book upon which I am insisting.