Mathematics is, likewise, an instrument of thought. It is the foundation of the physical sciences and the framework of the material universe. Its study trains the mind to think in relations and quantities, and helps to obviate loose and confused thinking. Logic and psychology are also important factors in developing the power of orderly and protracted thought. The substantive element in a liberal education is found in the study of the natural and moral sciences. The study of them is both attractive and stimulating, and helps to store the mind with useful facts and principles. A general study of science should be required. A knowledge of any favorite science involves in some measure a knowledge of others. Physics, chemistry, biology, astronomy, are all more or less related. There is an interacting and interweaving of the facts and principles. Aside from the information imparted, there is no other class of study that will so effectively train the mind to accurate habits of observation. Philosophy is the interpretative element in education, and helps to give unity to our knowledge. No one can reasonably lay claim to be liberally educated who has not some knowledge of the philosophical principles which underlie and explain the phenomena of history and life. These required studies should be embraced and upheld in all college courses in order to give unity and consistency to the knowledge of the student. The value of these different studies cannot be reasonably doubted. The colleges of the past developed strength by studying these few subjects. No technical studies or professional training can be substituted for this scholastic training. The professional man especially needs this general culture, in order to escape the danger of concentrating and contracting his intellectual interest. Colleges may vigorously adhere to these scholarly requirements, and yet advantageously introduce the elective system. The student must have depth as well as breadth of scholarship. This can be effectively done by the specialization which the elective system affords. The character of the different studies chosen, however, should have a cohesive and logical connection in order to secure concentration and attain the best results.