The International Scientific Series continued. 



XXXIII. SIGHT : an Exposition of the Principles of Monocular and 



Binocular Vision. By JOSEPH LE COXTE, LL.D. Second Edition. With 

 132 Illustrations. 



XXXIV. ILLUSIONS: a Psychological Study. By JAMES SULLY. 



Third Edition. 



XXXV. VOLCANOES : what they are and what they teach. By 



JOHN W. JUDD, F.R.S. Fourth Edition. With 96 Illustrations. 



XXXVI. SUICIDE : an Essay on Comparative Moral Statistics. 



By Professor H. MORSELLI. Second Edition. 



XXXVII. THE BRAIN AND ITS FUNCTIONS. By J. LUTS, 

 Physician to the Hospice de la Salpetriere. With numerous Illus- 

 trations. Third Edition. 



XXXVIII. MYTH AND SCIENCE : an Essay. By TITO VIGSTOLI. 

 Third Edition. 



XXXIX. THE SUN. By C. A. YOUNG, Ph.D., LL.D. Fourth Edition. 

 With numerous Illustrations. 



XL. ANTS, BEES, and "WASPS. A Record of Observations 

 on the Habits of the Social Hynieuoptera. By Sir JOHX LUBBOCK, 

 Bart., U.P. Tenth Edition. With 5 Chromo-lithographic PJates. 



XLI. ANIMAL INTELLIGENCE. By GEORGE J. ROMANES, 

 LL.D., F.R.S. Fifth Edition. 



XLIL The CONCEPTS and THEORIES of MODERN 

 PHYSICS. By J. B. STALLO. Third Edition. 



XLIII. DISEASES of MEMORY. An Essay in the Positive 

 Psychology. By TH. RIBOT. Third Edition. 



XLIV. MAN BEFORE METALS. By N. JOLT, Correspondent 

 de 1'Institut de France. Fifth Edition. With 148 Illustrations. 



XLV. THE SCIENCE of POLITICS. By Prof. SHELDON 



AJIOS. Third Edition. 



XLVI. ELEMENTARY METEOROLOGY. By ROBEET H. 

 SCOTT. Fifth Edition. 



XLVII. THE ORGANS of SPEECH. By GEOKG HERMANN 

 VON MEYEK. With 47 Illustrations. 



XL VIII. FALLACIES : a View of Logic from the Practical Side. 

 By ALFRED SIDGWICK. Second Edition. 



XLIX. THE ORIGIN OF CULTIVATED PLANTS. By 

 ALPHONSE DE CAXDOLLE. Second Edition. 



L. JELLY FISH, STAR FISH, AND SEA URCHINS. 



Being a Research on Primitive Nervous Systems. By G. J. ROMANES, 

 LL.D., F.R.S. Second Edition. 



LI. THE COMMON SENSE OF THE EXACT 



SCIENCES. By the late WILLIAM KIXGDON CLIFFORD. Third Edition, 

 With 100 Figures. 



London : KEGAN PAUL, TRENCH, TRUBEER, & CO., LTD. 



