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ACOUSTICS 91
The science itself is the result of many years of intelligent and intense research on the part of the late Wallace C. Sabine, who was Professor of Mathematics and Natural Philosophy at Harvard University; and the soundness of his study has been established beyond all question of a doubt by more than seventeen years of practical experience in acoustical design and correction. Before 1895 little information on the subject was available. Architects were guided in large measure by their own intuition and limited experience. Professor Sabine began studying the subject in 1895, and in 1900 published the result of his five years' work in the Engineering Record. This was the first real contribution to the science as we know it; and because of his efforts and the scope of his studies the chances of conjecture of acoustics were done away with and the problem was put on a mathematical basis.
The research was motivated originally by the fact that Harvard University, after completing the Fogg Art Museum, found that the auditorium it contained was useless for lectures. In their difficulty the authorities appealed to the scientific staff of the faculty for advice and assistance. Thereupon Professor Sabine undertook the study of the emergency and, as a result, developed a new branch of science. So completely and carefully did the professor carry out his work that subsequent investigators have done but little in the way of extending the theoretical foundations he laid down. For the most part they have merely enlarged upon our knowledge of the acoustic properties of various materials used in building construction. The principles and the practical application gained from Professor Sabine's work and augmented by that of others who devoted themselves to the subject made it possible to determine from the plans of a public building, together with facts concerning the materials of construction, what the acoustical conditions in the completed building would be,