ITie International Sdentiflc SfeHs*— (Contlnned.) 



17. MONET AND THE MECHANISM OF EXCHANGE. By W. Stanley 



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18. THE NATURE OP LIGHT, with a General Accotint of Physical Optics. By 



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19. ANIMAL PARASITES AND MESSMATES. By Monsienr VAN Bekbden. 



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21. THE FIVE SENSES OP MAN. By Professor Bebhstedi. With 91 Ulns- 



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22. THE THEORY OF SOOND IN ITS RELATION TO MUSIC. By Pro- 



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23. STUDIES IN SPECTRUM ANALYSIS. By J. Noeman Lookteb, F. R. S. 



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24. A HISTORY OF THE GROWTH OF THE STEAM-ENGINE. By Pro- 



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25. EDUCATION AS A SCIENCE. By AiEXANDEK Baxn, LL.D. $1.75. 



26. STUDENTS' TEXT-BOOK OF COLOR; Or, Modem Chromatics. With 



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27. THE HUMAN SPECIES. By Professor A. db Quateefageb, Membre do 



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28. THE CR.\YFISH : An Introduction to the Study of Zoology. By T. H. 



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29. THE ATOMIC THEORY. By Professor A. Wuetz. Translated by E. 



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30. ANIMAL LIFE AS AFFECTED BY THE NATURAL CONDITIONS OP 



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31. SIGHT: AnExpositionof the Principles of Monocular and Binocular Vision. 



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32. GENERAL PHYSIOLOGY OF MUSCLES AND NERVES. By Professor 



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