4 The International Scientific Series. — (Continued.) 



XXXV. VOLCANOES : What they Are and what they Teach. By 

 John W. Judd, F. E. S., Professor of Geology in the Koyal 

 School of Mines. With 96 Illustrations. $2.00. 

 XXXVI. SUICIDE: An Essay in Comparative Moral Statistics. By 

 Henby Morselli, M. D., Professor of Psychological Medi- 

 cine, Koyal University, Turin. $1.75. 

 XXXVII. THE FORMATION OF VEGETABLE MOULD, THROUGH 

 THE ACTION OF WORMS. With Observations on their 

 Habits. By Charles Darwin, LL. D., F. R. S., author of 

 "On the Origin of Species," etc., etc. With Illustrations. 

 $1.50. 

 XXXVIII. THE CONCEPTS AND THEORIES OF MODERN PHYS- 

 ICS. By J. B. Stallo. $1.75. 

 XXXIX. THE BRAIN AND ITS FUNCTIONS. By J. Lcts, ^\.^(\. 

 XL. MYTH AND SCIENCE. An Essay. By Tito Vignoli. $1.50, 



XLL diseases of MEMORY : An Essay in the Positive Psy- 

 chology. By Th. Ribot, author of " Heredity." From th» 

 French, by William Huntington Smith. $1.50. 



