The International Scientific ^mes.— (Continued.) 3 



30. ANIMAL LIFE AS AFFECTED BY TPIE NATUEAL CONDI- 



TIONS OF EXISTENCE. By Karl SEiiPER. With 2 Maps and 

 106 Woodcuts. $2.00. 



31. SIGHT: An Exposition of the Principles of Monocular and Binocular 



Virion. By Joseph Le Conte, LL. D. With 132 Illustrations. 

 $1.50. 



32. GENERAL PHYSIOLOGY OF MUSCLES AND NERVES. By 



Prof.'ssor J. Rosenthal. W' ith 75 Illustrations. $1.50. 



33. ILLUSIONS : A Psychological Study. By James Sully. $1.50. 



34. THE SUN. By C. A. Young, Professor of Astronomy in the College 



of New Jersey. With numerous Illustrations. $2.00. 



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



JuDD, F. R. S., Professor of Geology in the Royal School of Mines. 

 With 96 Illustrations. $2.00. 



36. SUICIDE : An Essay in Comparative Moral Statistics. By Henet 



MoRSELLi, M. D., Professor of Psychological Medicine, Royal Uni- 

 versity, Turin. $1.75. 



37. THE FORMATION OF VEGETABLE MOULD, THROUGH THE 



ACTION OF WORMS. With Observations on tlieir Habits. By 

 Charles Darwin, LL. D., F. E. 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. Ltjts. $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.E. S., D. C. L., LL. D., etc. $2.00. 



43. SCIENCE OF POLITICS. By Sheldon Amos. $1.75. 



44. ANIMAL INTELLIGENCE. By George J. Eomanes. $1.75. 



45. MAN BEFOEE METALS. By N. Joly, Correspondent of the Insti- 



tute. With 148 Illustrations. $1.75. 



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



