ORIGIN OF LIFE -576 



5753 ENVIRONMENT. 



'5753 Semper, K. Natural conditions of existence as they 

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Lond. 1881. 



5754 NATURAL SELECTION. 



'5754 Coe, C. C. Nature versus natural selection. 



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'5754 Wallace, A. R. Darwinism an exposition of the 



theory of natural selection. Lond. 1889. 



'5754 Natural selection and tropical nature. Lond. 1891. 



5757 DEGENERATION. 



'5757 Demoor, J. Evolution by atrophy in biology and 

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Lond. 1899. 



'5757 Sutton, J. B. Evolution and disease. (Contemp. 

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'5757 Talbot, E. S. Degeneracy, its causes, signs and re- 

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576 ORIGIN OF LIFE. 



576 Bastian, H. C. Nature and origin of living matter. 



Lond. 1905. 

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576 Burke, J. B. Origin of life, its physical basis and 



definition. Lond. 1906. 



576 Hertwig, O. Biological problem of to-day. Trans, 



from German. Lond. 1896. 



57604 Wolff, C. F. Theoria generations. Uebers. [from Lat.j. 

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57604 Pasteur, L. Die in der Atmosphare vorhandeneri 

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5761 Darwin, C. Origin of species. Lond. 1873. 



5761 Mivart, St G. Genesis of species. Lond. 1871. 



87 



