The International Scientific <Se?i&s— (.Continued.) 3 



35. VOLCANOES : What they Are and what they Teach. By John W. Judd, 



F. R. S., Professor of Geology in the Itoyal School of Mines. With 96 Il- 

 lustrations. $2.00. 



36. SUICIDE: An Essay in Comparative Moral Statistics. By Henry Mor- 



SELLi, M.D., Professor of Psychological Medicine, Royal University, 

 Turin. $1.75. 



37. THE FORMATION OF VEGETABLE MOULD, THROUGH THE AC- 



TION OF WORMS. With Observations on their Habits. By Charles 

 Darwin, LL.D., F.R.S. With Illustrations. $1.50. 



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



Staxlo. $1.75. 



39. THE BRAIN AND ITS FUNCTIONS. By J. LuTS. §1.50. 



40. MYTH AND SCIENCE. By Tito Vignoli. $1.50. 



41. DISEASES OP 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 tbe Habits of 



the Social Hymenoptera. By Sir John Lubbock, Bart., F. R. S., D. C. L., 

 LL. D., etc. $2.00. 



43. SCIENCE OP POLITICS. By Shelbon Amos. $1.75. 



44. ANIMAL INTELLIGENCE. By Geoege J. Romanes. $1.75. 



45. MAN BEFORE METALS. By N. Jolt, Correspondent of the Institute. 



With 148 Illustrations. $1.75. 



46. THE ORGANS OP SPEECH AND THEIR APPLICATION IN THE 



FORMATION OF ARTICULATE SOUNDS. By G. H. von Meter, Pro- 

 fessor in Ordinary of Anatomy at the University of Ziirich. With 47 

 Woodcuts. $1.75. 



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



Sldgwick, B. A., Oxon. $1.75. 



48. ORIGIN OF CULTIVATED PLANTS. By Alphonse be Candolle. $2.00. 



49. JELLY-FISH, STAR-PISH, AND SEA-URCHINS. Being a Research on 



Primitive Nervous Systems. By George J. Romanes. $1.75. 



50. THE COMMON SENSE OP THE EXACT SCIENCES. By the late Will- 



iam KiNGDON Clifford. $1.50. 



51. PHYSICAL EXPRESSION: Its Modes and Principles. By Francis War- 



ner, M. D., Assistant Physician, and Lecturer on Botany to the London 

 Hospital, etc. With 51 Illustrations. $1.75. 



52. ANTHROPOID APES. By Robert Hartmann, Professor in the University 



of Berlin. With 63 Hlnstrations. $1.75. 



New York : D. APPLETON & CO., 1, 3, & 5 Bond Street. 



