COPYRIGHT 



First Published 1905. 



Secofid Edition {revised) 1907. 



Reprinted igo8, igog. 



American Edition igcg. 



German Edition igio. 



Swedish Edition igii. 



Third Edition {entirely rewritten and much enlarged") igii. 



Fourth Edition {revised) igi2. 



Russian Edition, IQ13. 



Fifth Edition^ ^gig. 

 Japanese Edition^ 1919- 



