Space and Geometry in 

 the Light of Physiolog- 

 ical, Psychological and 

 Physical Inquiry. By 



Dr. Ernst Mach, Emeritus Pro- 

 fessor in the University of Vienna. 

 From the German by Thomas J. 

 McCormack, Principal of the 

 LaSalle-Peru Township High 

 School. 1906. Cloth, gilt top. 

 Pp.143. $1.00 net. (5s.net.) 



In these essays Professor Mach dis- 

 cusses the questions of the nature,origin,and 

 development of our concepts of space from 

 the three points of view of the physiology 

 and psychology of the senses, history, and 

 physics, in all which departments his pro- 

 found researches have gained for him an 

 authoritative and commanding position. 

 While in most works on the foundations of 

 geometry one point of view only is empha- 

 sized be it that of logic, epistemology, psy- 

 chology, history, or the formal technology 

 of the science here light is shed upon the subject from all points of view combined, 

 and the different sources from which the many divergent forms that the science of 

 space has historically assumed, are thus shown forth with a distinctness and precision 

 that in suggestiveness at least leave little to be desired. 



Any reader who possesses a slight knowledge of mathematics may derive from 

 these essays a very adequate idea of the abstruse yet important researches of meta- 

 geometry. 



The Vocation Ot Man. By Johann Gottlieb Fichte. Translated 

 by William Smith, LL. D. Reprint Edition. With biographical intro- 

 duction by E. Ritchie, Ph. D. 1906. Pp. 185. Cloth, 75c net. Paper, 25c; 

 mailed, 31c. (Is. 6d.) 



Everyone familiar with the history of German Philosophy recognizes the im- 

 portance of Fichte's position in its development. His idealism was the best exposition 

 of the logical outcome of Kant's system in one of its principal aspects, while it was 

 also the natural precurs r of Hegel's philosophy. But the intrinsic value of Fichte's 

 writings have too often been overlooked. His lofty ethical tone, the keenness of his men- 

 tal vision and the purity of his style render his works a stimulus and a source of satisfac- 

 tion to every intelligent reader. Of all his many books, that best adapted to excite an 

 interest in his philosophic thought is the Vocation of Man, which contains many of his 

 most fruitful ideas and is an excellent example of the spirit and method of his teaching. 



The Rise Ot Man. A Sketch of the Origin of the Human Race. 



By Paul Cams. Illustrated. 1906. Pp.100. Boards, cloth back, 75c net. 

 (3s. 6d. net.) 



Paul Cams, the author of The Rise of Man, a new book along anthropological 

 lines, upholds the divinity of man from the standpoint of evolution. He discusses the. 

 anthropoid apes, the relics of primitive man, especially the Neanderthal man and the 

 ape-man of DuBois, and concludes with a protest against Huxley, claiming that man has 

 risen to a higher level not by cunning and ferocity, but on the contrary by virtue of his 

 nobler qualities. 



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