Recent Books by Distinouished Specialists. 



The Comparative Physiology and Morphology 

 of Animals. 



By Prof. Joseph Le CoNTE. Illustrated. i2mo. Cloth, $2.00. 



Evolution by Atrophy. 



By Jean Demoor, Jean Massart, and Emile Vandervelde 

 A new volume in the International Scientific Series. i2mo. 

 Cloth, $1.50. 



Foot-Notes to Evolution. 



A Series of Popular Addresses on the Evolution of Life. By 

 David Starr Jordan, Ph. D., President of Leland Stanford 

 Junior University. i2mo. Cloth, $1.50. 



Outlines of the Earth's History. 



A Popular Study in Physiography. By Prof. N. S. Shaler, of 

 Harvard University. Illustrated. i2mo. Cloth, $1.50. 



Studies of Good and Evil. 



By JosiAH RoYCE, Professor of the History of Philosophy in 

 Harvard University. i2mo. Cloth, $1.50. 



Evolutional Ethics and Animal Psychology. 



By E. P. Evans, author of "Animal Symbolism in Ecclesiastical 

 Architecture," etc. i2mo. Cloth, $1.75. 



Wages and Capital. 



An Examination of the Wages Fund Doctrine. By F. W. TAUS- 

 SIG, Professor of Political Economy in Harvard University, author 

 of " Tariff History of the United States " and " The Silver Situa- 

 tion in the United States." i2mo. Cloth, $1.50. 



What is Electricity? 



By Prof. John Trowbridge, of Harvard University. i2mo. 

 Cloth, $1.50. 



The Psychology of Suggestion. 



A Research into the Subconscious Nature of Man and Society. 

 By Boris Sidis, M. A., Ph.D., Associate in Psychology at the 

 Pathological Institute of the New York State Hospitals. With 

 an Introduction by Prof. William James, of Harvard University. 

 Illustrated. i2mo. Cloth, $1.75. 



L». APPLETON AND COMPANY, NEW YORK. 



