The International Scientific ASmes— (Continued.) 
3 
55, VOLCANOES: What they Are and what they Teach. By John W. Judd, 
F. B. S., Professor of Geology in the Royal School of Mines. With 96 JLL 
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 OF MODERN PHYSICS. By J. B. 
Stallo. $1.75. 
39. THE BRAIN AND ITS FUNCTIONS. By J. Buys. $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., D. C. L., 
LL. D., etc. $2.00. 
43. SCIENCE OF POLITICS. By Sheldon Amos. $1.75. 
44. ANIMAL INTELLIGENCE. By George J. Romanes. $1.75. 
45. MAN BEFORE METALS. By N. Joly, Correspondent of the Institute. 
With 148 Illustrations. $1.75. 
46. THE ORGANS OF SPEECH AND THEIR APPLICATION IN THE 
FORMATION OF ARTICULATE SOUNDS. By G. H. von Meyer, Pro- 
fessor in Ordinary of Anatomy at the University of Zurich. With 47 
Woodcuts. $1.75. 
47. Fx\LLACIES: A View of Logic from the Practical Side. By Alfred 
Sidgwick, B. A., Oxon. $1.75. 
48. ORIGIN OF CULTIVATED PLANTS. By Alphonse de Candolle. $2.00. 
49. JELLY-FISH, STAR-FISH, AND SEA-URCHINS. Being a Research on 
Primitive Nervous Systems. By George J. Romanes. $1.75. 
50. THE COMMON SENSE OF 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 Hlustrations. $1.75. 
New York : D. APPLETON & CO., 1, 8, & 5 Bond Street. 
