At the recent meeting of the American Association for the Advancement of Science Professor Orton contributed a special paper on the local geology of Columbus, the place of the meeting, in which he dwelt largely on the origin of the drift that marks the superficial geology of the vicinity. Of the work he has done for the increase and advancement of knowledge, the extent of a part of which we have only faintly indicated by the mention of a few particular researches, Professor Orton put the highest value on his labors as a teacher, a calling to which he was devoted for more than half a century. He found peculiar pleasure in instructing the children of the old pupils whom he had taught in his younger days. He was actively concerned in the promotion and extension of sanitary science, his addresses in that field having been one of the factors that led to the establishment of the Ohio State Board of Health. He was also greatly interested in the advancement of agriculture. A theme on which Professor Orton was fond of dwelling in his public addresses was the amount and value of what has been accomplished within a comparatively short time in the world's history by the use of the methods of science. In an address delivered before the alumni of Hamilton College in 1888 he maintained that we were living in a revolutionary period, which is marked by a great advance in knowledge and a vastly larger control of the forces of Nature; by a large increase in freedom of thought and action; by a sudden and remarkable addition to the mobility of man, accompanied by an unexampled growth of great cities; and by an incalculable addition to the wealth of the world. Accompanying these great changes in the material and intellectual world were certain moral transformations appearing to grow out of them. All these advances were ascribed to a movement--a new method of investigating Nature--that began, so far as its particular and continuous development is concerned, about three hundred years ago, but to which no date or founder's name could be attached. This new philosophy thoroughly respected Nature, was humble, patient in the accumulation of facts and the trial of its theories, comprehensive, progressive, and hopeful. It has given us the marvelous increase of knowledge which especially marks the nineteenth century; it has impressed its influence upon all branches of study, and has wrought great improvements in methods and results; and has rendered an immense and inestimable service to Christian theology, and done much to broaden and rationalize it and thus to perpetuate and strengthen its hold on the world. Finally, the method of science was pronounced "the best gift that God has given to the mind of man." A similar train of thought as to the material aspects is apparent, though in a somewhat different form, in an address on The Stored (or Fossil) Power of the World, delivered in 1894.