The International Scientific Series—(Continued.) 
1%. 
18, 
19. 
34. 
MONEY AND THE MECHANISM OF EXCHANGE. By W. Sranuzy 
Jevons, M.A, F.R.S. $1.75. 
THE NATURE OF LIGHT, with a General Account of Physical Optics. By 
Dr. Everne Lommex. With 188 Illustrations and a Table of Spectra in 
Chromo-lithography. $2.00. 
ANIMAL PARASITES AND MESSMATES. By Monsieur Van BENEDEN. 
With 83 Illustrations. $1.50. 
. FERMENTATION. By Professor ScoUTzENBERGER. With 28 Illustrations. 
$1.50. 
. THE FIVE SENSES OF MAN. By Professor BERNSTEIN. With 91 Illus- 
trations. $1.75. 
. THE THEORY OF SOUND IN ITS RELATION TO MUSIC. By Pro- 
fessor Pierro BLasERNA. With numerous Illustrations, $1.50. 
. STUDIES IN SPECTRUM ANALYSIS. By J. Norman Locryenr, F.R.S. 
With 6 Photographic Llustrations of Spectra, and numerous Engravings 
on Wood. $2.50. 
. A HISTORY OF THE GROWTH OF THE STEAM-ENGINE. By Pro- 
fessor R. H. Taurston. With 163 Illustrations. $2.50. 
. EDUCATION AS A SCIENCE. By Atexanper Bam, LL.D. $1.75. 
. STUDENTS’ TEXT-BOOK OF COLOR; Or, Modern Chromatics. With 
Applications to Art and Industry. By Professor Oapen N. Roop, Colum- 
bia College. New edition. With 130 Illustrations. $2.00. 
. THE HUMAN SPECIES. By Professor A. DE QuATREFAGES, Membre de 
l'Institut. $2.00. 
THE CRAYFISH: An Introduction to the Study of Zodlogy. By T. H. 
Huxziey, F.R.8. With 82 Illustrations. $1.75. 
. THE ATOMIC THEORY. By Professor A. Wurtz. Translated by E. 
Cleminshaw, F.C.S. $1.50. 
. ANIMAL LIFE AS AFFECTED BY THE NATURAL CONDITIONS OF 
EXISTENCE. By Karu SEMPER. With 2 Maps and 106 Woodcuts. $2.00. 
. SIGHT: An Exposition of the Principles of Monocular and Binocular Vision. 
By Joszpa Le Conte, LL.D. With 132 Illustrations. $1.50. 
. GENERAL PHYSIOLOGY OF MUSCLES AND NERVES. By Professor 
J. RosENTHAL. With 75 Illustrations. $1.50. 
. ILLUSIONS : A Psychological Study. By James Suuiy. $1.50. 
THE SUN. By C. A. Youna, Professor of Astronomy in the College of New 
Jersey. With numerous Dlustrations. $2.00. 
New York: D. APPLETON & CO., 1,3, & 5 Bond Street. 
