LIST OF WORKS REFERRED TO IN TEXT. 377 



38. Hermann Helmholtz, Populare wissenscliaftliclie Vortriige. 

 Braunschweig, 1871. 



(Hermann Helmholtz, Popular Scientific Lectures. Brunswick, 

 1871.) 



39. Alexander Humboldt, Ansichten der Natur. Stuttgart, 

 1826. 



(Alexander Humboldt, Views of Nature. Stuttgart, 1826.) 



40. Moritz Wagner, Die Darwin'sche Theorie und das 

 Migrationsgesetz der Organisnien. Leipzig, 1868. 



(Moritz Wagner, Darwin's Theory and the Law of the Migra- 

 tion of Organisms. Leipzig, 1868.) 



41. Rudolf Virchow, Vier Reden iiber Leben und Kranksein. 

 Berlin, 1862. 



(Rudolf Virchow, Four Discourses on Life and Disease. 

 Berlin, 1862.) 



42. Friedrich Milller, Bthnographie (Reise der oster- 

 reichischen Fregatte Novara. Anthropologischer Theil. 3 

 Abtheilung). Wien, 1868. 



(Friedrich Miiller, Ethnography (Voyage of the Austrian 

 Frigate Novara. Anthropological Part. 3rd Part). Vienna, 

 1868.) 



43. Ludivig Buchner, Die Stellung des Menschen in der 

 Natur, in Vergangenheit, Gegenwart und Zukunft. Leipzig, 

 1870. 



(Ludwig Biichner, Man's Place in Nature in the Past, the 

 Present, and the Future. Leipzig, 1870.) 



44. John Luhboclc, Prehistoric Times. London, 1867. 



45. Herbert Spencer, A System of Philosophy. (1. First 

 Principles. 2. Principles of Biology. 3. Principles of 

 Psychology, etc.) London, 1867. 2nd Edition. 



