The International Scientljic Series — cciilinue<l. 



XXVIII. The CRAYFISH: au Introduction to the Study of /<joloij:y. 

 By T. H. HuxLKY, F.R.S. Fourth Kdition. Witli 82 IlUistratiojis. r>.v. 



XXIX. The BRAIN as an ORGAN of MIND. By II. Chaumon 

 Bastian, M.D. Third Edition. With 184 llhistrations. r>.s. 



XXX. The ATOMIC THEORY. By Professor A. Wriiiy,. Traiis- 

 hited by E. Clemixshaw, F.C.S. Fourth Edition. A.«. 



XXXI. The NATURAL CONDITIONS of EXISTENCE aa 



they affect Animal Life. By Kakl Skmpku. Tliird Editian. 

 With 2 Maps and lOG Woodcuts. 5,s-. 



XXXII. GENERAL PHYSIOLOGYof MUSCLES and NERVES. 



By Prof. J. KosJENTHAL. Third Edition. With 75 Illustratiuns. o.<. 



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



Binocular Vision. By Joskpk Lh Contk, LL.D. Second Edition. With 

 132 Illustrations. 5s. 



XXXIV. ILLUSIONS: a Psychological Study. By Jamks .Sh.i.y. 



Second Edition. 5s. 



XXXV. VOLCANOES: what they are and what they teach. B} 



John W. Juun, F.ll.S. Third Edition. With 96 Illustrations, o.v. 



XXXVI. SUICIDE : an Essay on Comparative Moral Statistics. 



By Professor H. Mok.seli.i. Second Edition. 5.v. 



XXXVII. THE BRAIN AND ITS FUNCTIONS. By J. Li y.v 



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

 trations. Second Edition. 5«. 



XXXVIII. MYTH AND SCIENCE: an Essay. By Trio Vuixnu. 

 Third Edition. 5*. 



XXXIX. THE SUN. By C. A. Young, Ph.D., LL.D. Third Edition. 

 With uumerons Illustrations, o.?. 



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

 on the Habits of the Social Hyuienoptera. By Su- John Li:kj:.hk, 

 Bart., M.P. Ninth Edition. With 5 Chromo-lithographic Plates, .'«. 



XLI. ANIMAL INTELLIGENCE. By George J. Romanks. 

 LL.D., F.R.S. Fourth Edition. 5s. 



XLIL The CONCEPTS and THEORIES of MODERN 

 PHYSICS. By J. B. .Stali.o. Third Edition. 6... 



XLIII. DISEASES of MEMORY. An Essay iu tiic Positive 

 Psychology. By Th. Ribot. Third Edition. 5*. 



London: KEGAN PAUL, TRENCH, & CO., 1 Paternoster Sniiare. 



