The International Scientific Series—(Continued.) a 
35. VOLCANOES: What they Are and what they Teach. By Joun W. Jupp, 
F.R.8., Professor of Geology in the Royal School of Mines. With 96 Il- 
lustrations. $2.00. 
36. SUICIDE: An Essay in Comparative Moral Statistics. By Henry Mor- 
BELLI, 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 CHaR.zs 
Darwiy, LL. D., F.R.S8. With Dlustrations. $1.50. 
38. THE CONCEPTS AND THEORIES OF MODERN PHYSICS. By J.B. 
STatLo. $1.75. 
89. THE BRAIN AND ITS FUNCTIONS. ByJ.Luys. $1.50. 
40. MYTH AND SCIENCE. By Tito Vienout. $1.50. 
41. DISEASES OF MEMORY: An Essay in the Positive Psychology. By Tx. 
Rigor, author of “Heredity.” $1.50. 
42. ANTS, BEES, AND WASPS. A Record of Observations of the Habits of 
the Social Hymenoptera. By Sir Jonn Luszoox, Bart., F.R.9., D.C. L., 
LL. D., etc. $2.00. 
43. SCIENCE OF POLITICS. By SHELDON Amos. $1.75. 
44, ANIMAL INTELLIGENCE. By Gzorcz J. RoMANES. $1.75. 
45. MAN BEFORE METALS. By N. Jouy, Correspondent of the Institute. 
With 148 Dlustrations. $1.75. 
46. THE ORGANS OF SPEECH AND THEIR APPLICATION IN THE 
FORMATION OF ARTICULATE SOUNDS. By G. H. von Mrver, Pro- 
fessor in Ordinary of Anatomy at the University of Zirich. With 47 
Woodcuts. $1.75. ; 
4%. FALLACIES: A View of Logic from the Practical Side. By ALFRED 
Smewicr, B.A., Oxon. $1.75. 
48. ORIGIN OF CULTIVATED PLANTS. By ALPHONSE DECANDOLLE. $2.00. 
49. JELLY-FISH, STAR-FISH, AND SEA-URCHINS. Being a Research on 
Primitive Nervous Systems. By Gzorce J. Romanes. $1.75. 
50. THE COMMON SENSE OF THE EXACT SCIENCES. By the late Wii1- 
tam KInapon Crirrorp. $1.50. 
51. PHYSICAL EXPRESSION: Its Modes and Principles. By Franois War- 
NER, M.D., Assistant Physician, and Lecturer on Botany to the London 
Hospital, etc. With 51 Dlustrations. $1.75. 
&2, ANTHROPOID APES. By Rosert Harrmann, Professor in the University 
of Berlin. With 63 Illustrations. $1.75. 
New York: D. APPLETON & CO., 1,3, &5 Bond Street. 
