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.

PHYSICS AND POLITICS; Or, Thoughts on the Application of the Principles of “Natural Selection” and “Inheritance” to Political Society. By Walter Bagehot. $1.50.

FOODS. By Edward Smith, M. D., LL. B., F. R. S. With numerous Illustrations. $1.75.

MIND AND BODY: The Theories of their Relation. By Alexander Bain, LL. D. With 4 Illustrations. $1.50.

THE STUDY OF SOCIOLOGY. By Herbert Spencer. $1.50.

THE NEW CHEMISTRY. By Professor J. P. Cooke, of Harvard University. With 31 Illustrations. $2.00.

ON THE CONSERVATION OF ENERGY. By Balfour Stewart, M.A., LL. D., F. R. S. With 14 Illustrations. $1.50.

ANIMAL LOCOMOTION; or, Walking, Swimming, and Flying. By J. B. Pettigrew, M. D., F. R. S., etc. With 130 Illustrations. $1.75.

RESPONSIBILITY IN MENTAL DISEASE. By Henry Maudsley, M.D. $1.50.

THE SCIENCE OF LAW. By Professor Sheldon Amos. $1.75.

ANIMAL MECHANISM: A Treatise on Terrestrial and Aërial Locomotion, By Professor E. J. Marey. With 117 Illustrations. $1 75.

THE HISTORY OF THE CONFLICT BETWEEN RELIGION AND SCIENCE. By J. W. Draper, M. D., LL. D. $1.75.

THE DOCTRINE OF DESCENT AND DARWINISM. By Professor Oscar Schmidt (Strasburg University). With 26 Illustrations. $1.50.

THE CHEMICAL EFFECTS OF LIGHT AND PHOTOGRAPHY. By Dr. Hermann Vogel (Polytechnic Academy of Berlin). Translation thoroughly revised. With 100 Illustrations. $2.00.

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.

THE LIFE AND GROWTH OF LANGUAGE. By Professor William Dwight Whitney, of Yale College. $1.50.

MONEY AND THE MECHANISM OF EXCHANGE. By W. Stanley Jevons, M. A., F. R. S. $1.75.