THE INTERNATIONAL SCIENTIFIC SERIES. VOLUME XLIV. I HAVE recently learnt from the publishers of the 'International Scientific Series' that they have made arrangements with Sir John Lubbock to bring out in the same series a work of his on Ants and Bees. Necessarily, therefore, the material to be dealt with in his work will to a large extent overlap that which is presented by my chapters on the same insects; but after consulting with the publishers, and also with Sir John Lubbock, it has seemed to me undesirable to omit these chapters on account of the circumstances here stated. For, on the one hand, the facts will not lose their value from being twice told; and on the other, it is desirable that the present member of the Series should form in itself, so far as its Author can make it, a complete _résumé_ of all the more important facts of _Animal Intelligence_. THE INTERNATIONAL SCIENTIFIC SERIES. EACH BOOK COMPLETE IN ONE VOLUME, 12MO, AND BOUND IN CLOTH. I. FORMS OF WATER: a Familiar Exposition of the Origin and Phenomena of Glaciers. By J. TYNDALL, LL. D., F. R. S. With 25 Illustrations. $1.50. II. PHYSICS AND POLITICS; Or, Thoughts on the Application of the Principles of "Natural Selection" and "Inheritance" to Political Society. By WALTER BAGEHOT. $1.50. III. FOODS. By EDWARD SMITH, M.D., LL.B., F. R. S. With numerous Illustrations. $1.75. IV. MIND AND BODY: The Theories of their Relation. By ALEXANDER BAIN, LL. D. With Four Illustrations. $1.50. V. THE STUDY OF SOCIOLOGY. By HERBERT SPENCER. $1.50. VI. THE NEW CHEMISTRY. By Professor J. P. COOKE, of Harvard University. With 31 Illustrations. $2.00. VII. ON THE CONSERVATION OF ENERGY. By BALFOUR STEWART, M. A., LL. D., F. R. S. With 14 Illustrations. $1.50. VIII. ANIMAL LOCOMOTION; or, Walking, Swimming, and Flying. By J. B. PETTIGREW, M. D., F. R. S., etc. With 130 Illustrations. $1.75. IX. RESPONSIBILITY IN MENTAL DISEASE. By HENRY MAUDSLEY, M. D. $1.50. X. THE SCIENCE OF LAW. By Professor SHELDON AMOS. $1.75. XI. ANIMAL MECHANISM: A Treatise on Terrestrial and Aërial Locomotion. By Professor E. J. MAREY. With 117 Illustrations. $1.75. XII. THE HISTORY OF THE CONFLICT BETWEEN RELIGION AND SCIENCE. By J. W. DRAPER, M. D., LL. D. $1.75. XIII. THE DOCTRINE OF DESCENT AND DARWINISM. By Professor OSCAR SCHMIDT (Strasburg University). With 26 Illustrations. $1.50. XIV. THE CHEMICAL EFFECTS OF LIGHT AND PHOTOGRAPHY. By Dr. HERMANN VOGEL (Polytechnic Academy of Berlin). Translation thoroughly revised. With 100 Illustrations. $2.00. XV. FUNGI: Their Nature, Influences, Uses, etc. By M. C. COOKE, M. A., LL. D. Edited by the Rev. M. J. BERKELEY, M. A., F. L. S. With 109 Illustrations. $1.50.