The International Scientific Series. (Continued.) 



38. THE CONCEPTS AND THEORIES OF MODERN PHYSICS. By J. B. 



STALLO. $1.75. 



39. THE BRAIN AND ITS FUNCTIONS. By J. LUYS, Hospice Salpetriere, 



Paris. With 6 Illustrations. $1.50. 



40. MYTH AND SCIENCE. By TITO VIGNOLI. $1.50. 



41. DISEASES OF MEMORY : An Essay in the Positive Psychology. By TH. 



RIBOT, author of " Heredity." $1.50. 



42. ANTS, BEES. AND WASPS. A Record of Observations of the Habits of 



the Social Hymenoptera. By Sir JOHN LUBBOCK, Bart., F. R. S., etc. $2.00. 



43. THE SCIENCE OF POLITICS. By Professor SHELDON AMOS. $1.75. 



44. ANIMAL INTELLIGENCE. By GEORGE J. ROMANES, M. D., F. R. 8. $1.75. 



45. MAN BEFORE METALS. By Professor N. JOLT, Science Faculty of Tou- 



louse. With 148 Illustrations. $1.75. 



46. THE ORGANS OF SPEECH AND THEIR APPLICATION IN THE 



FORMATION OF ARTICULATE SOUNDS. By Professor G. H. VON 

 METER, University of Zurich. With 47 Illustrations. $1.75. 



47. FALLACIES : A View of Logic from the Practical Side. By ALFRED 



SIDGWICK, B. A., Oxon. $1.75. 



48. ORIGIN OF CULTIVATED PLANTS. By ALPHONSE DECANDOLLE. $2.00. 



49. JELLY-FISH, STAR-FISH, AND SEA-URCHINS. A Research on Primi- 



tive Nervous Systems. By GEORGE J. ROMANES, M. D., F. R. S. With 63 

 Illustrations. $1.75. 



50. THE COMMON SENSE OF THE EXACT SCIENCES. By WILLIAM KING- 



DON CLIFFORD. With 100 Figures. $1.50. 



51. PHYSICAL EXPRESSION : Its Modes and Principles. By FRANCIS WAB- 



NER, M.D., Assistant Physician, London Hospital. With 51 Illustrations 

 $1.75. 



52. ANTHROPOID APES. By Professor ROBERT HARTMANN, University of 



Berlin. With 63 Illustrations. $1.75. 



53. THE MAMMALIA IN THEIR RELATION TO PRIMEVAL TIMES. By 



Professor OSCAR SCHMIDT, University of Strasburg. With 51 Illustrations. 

 $1.50. 



54. COMPARATIVE LITERATURE. By Professor H. M. POSNETT, M. A., Uni- 



versity College, Auckland. $1.75. 



55. EARTHQUAKES AND OTHER EARTH MOVEMENTS. By Prof essor JOHN 



MILNE, Imperial College of Engineering, Tokio. With 38 Figures. $1.75. 



56. MICROBES, FERMENTS, AND MOULDS. By E. L. TROUESSART. With 



107 Illustrations. $1.50. 



57. THE GEOGRAPHICAL AND GEOLOGICAL DISTRIBUTION OF ANI- 



MALS. By Professor ANGELO HEILPRIN, Academy of Natural Sciences, 

 Philadelphia. $2.00. 



58. WEATHER. A Popular Exposition of the Nature of Weather Changes from 



Day to Day. With 96 Diagrams. By Hon. RALPH ABERCHOMBY. $1.75. 



