The International Scientific Series continued. 



XX. FEBMENTATION. By Professor SCHUTZENBEHGER. With 

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XXI. The FIVE SENSES of MAN. By Professor BERNSTEIN. 

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XXII. The THEORY of SOUND in its BELATION to MUSIC. 



By Professor PTETRO BLASBRNA. With numerous Illustrations. Sixth 

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XXIII. STUDIES in SPECTBUM ANALYSIS. By J. NORMAN 



LOCKYER, F.R.S. With Six Photographic Illustrations of Spectra, and 

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XXIV. A HISTOKY of the GBOWTH of the STEAM ENGINE. 



By Professor R. H. THTRSTON. With numerous Illustrations. Fifth 

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XXV. EDUCATION as a SCIENCE. By ALEXANDER BAIN, LL.D. 

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XXVI. The HUMAN SPECIES. By Professor A. DE QUATBEFAGES, 



Membre de 1'Institut. Fifth Edition. 



XXVII. MODEKN CHKOMATICS. With Application to Art and 

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XXVIII. The CBAYFISH : an Introduction to the Study of Zoology. 

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XXIX. The BBAIN as an OBGAN of MIND. By H. CHARLTON 

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XXX. The ATOMIC THEOBY. By Professor A. WURTZ. Trans- 

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XXXI. The NATURAL CONDITIONS of EXISTENCE as 

 they affect Animal Life. By KARL SEMPER. Fourth Edition. 

 With 2 Maps and 106 Woodcuts. 



XXXII. GENEBAL PHYSIOLOGYof MUSCLES and NEBVES. 



By Prof. J. ROSENTHAL. Fourth Edition. With 75 Illustrations. 



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



Binocular Vision. By JOSEPH LE CONTE, LL.D. Third Edition. With 

 132 Illustrations. 



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



Fourth Edition. 



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



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



XXXVI. SUICIDE : an Essay on Comparative Moral Statistics. 



By Professor H. MORSELLI. Second Edition. 



XXXVII. The BBAIN and its FUNCTIONS. By J. Ltrrs, 



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

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XXXVIII. MYTH and SCIENCE : an Essay. By TITQ VIONOLI. 



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 XXXIX. The SUN. By C. A. YOUNG, Ph.D., LL.D. Fifth Edition 



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

 on the Habits of the Social Hymenoptera. By Sir JOHN LUBBOCK, 

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London: KEGAN P/UJL, TRENCH, TRUBNER, & CO., LTD, 



