SCIENTIFIC WORKS
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| Antiquity of Man. By James Geikie, F. R. S. E., F. G. S., of H. M. Geological Survey of Scotland, With Maps and Illustrations. 1 Vol., 12mo.Cloth, | $2 50 |
| HAECKEL. The History of Creation; or, the Development of the Earth and its Inhabitants by the Action of Natural Causes. A Popular Exposition of the Doctrine of Evolution in general, and of that of Darwin, Goethe, and Lamarck, in particular. From the German of Ernst Haeckel, Professor in the University of Jena. The translation revised by Professor E. Ray Lankester, M. A., F. R. S., Fellow of Exeter College, Oxford. Illustrated with Lithographic Plates. In 2 vols., 12mo.Cloth, | 5 00 |
| HARRIS (GEORGE, F. S. A.) Civilization considered as a Science. 1vol., 12mo.Cloth, | 1 50 |
| HELMHOLTZ (H.), Professor of Physics in the University of Berlin. Popular Lectures on Scientific Subjects. Translated by E. Atkinson, Ph. D., F. C. S. With an Introduction by Prof. Tyndall. 12mo.Cloth, | 2 00 |
| HUXLEY'S Man's Place in Nature. 1 vol., 12mo.Cloth, | 1 25 |
| On the Origin of Species. 1 vol., 12mo.Cloth, | 1 00 |
| More Criticisms on Darwin, and Administrative Nihilism. 1 vol., 12mo.Limp Cloth, | 50 |
| A Manual of the Anatomy of Vertebrated Animals. Illustrated. 1 vol., 12mo.Cloth, | 2 50 |
| Lay Sermons, Addresses, and Reviews. 1 vol., 12mo.Cloth, | 1 75 |
| Critiques and Addresses. 12moCloth, | 1 50 |
| Direct Evidence of Evolution. Lectures delivered in N. Y. City in Sept., 1876. (In press.) | |
| HUXLEY and YOUMANS'S Elements of Physiology and Hygiene. By T. Huxley and W. J. Youmans. 1 vol., 12mo. | 1 75 |
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INTERNATIONAL SCIENTIFIC SERIES. |
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| No. I. Forms of Water in Clouds, Rain, Rivers, Ice, and Glaciers. By Prof. John Tyndall, LL. D., F. R. S. 1 vol., 12mo.Cloth, | $1 50 |
| II. Physics and Politics; or, Thoughts on the Application of the Principles of "Natural Selection," and "Inheritance," to Political Society. By Walter Bagebot, Esq., author of "The English Constitution." 1 vol., 12mo.Cloth, | 1 50 |
| III. Foods. By Edward Smith, M. D., LL. B., F. R. S. 1 vol.Cloth, | 1 75 |
| IV. Mind and Body. The Theories of their Relations. By Alex. Bain, LL. D., Professor of Logic in the University of Aberdeen. 1 vol., 12mo.Cloth, | 1 50 |
| V. The Study of Sociology. By Herbert Spencer. 1 vol., 12mo.Cloth, | 1 50 |
| VI. The New Chemistry. By Prof Josiah P. Cooke, Jr., of Harvard University. 1 vol., 12mo.Cloth, | 2 00 |
| VII. The Conservation of Energy. By Prof. Balfour Stewart, LL. D., F. R. S. 1 vol., 12mo.Cloth, | 1 50 |
| VIII. Animal Locomotion; or, Walking, Swimming, and Flying, with a Dissertation on Aëronautics. By J. Bell Pettigrew, M. D., F. R. S., F. R. S. E., F. R. C. P. E. 1 vol., 12mo. Fully illustrated.Cloth, | 1 75 |
| IX. Responsibility in Mental Disease. By Henry Maudsley, M. D. 1 vol., 12mo.Cloth, | 1 50 |
| X. The Science of Law. By Prof. Sheldon Amos. 1 vol., 12mo.Cloth, | 1 75 |
| XI. Animal Mechanism. A Treatise on Terrestrial and Aërial Locomotion. By E. J. Marey. With 117 Illustrations. 1 vol., 12mo.Cloth, | 1 75 |
| XII. The History of the Conflict |
