6 Elementary Biology. 



such as Botany, Zoology, Anthropology, and Sociology, all 

 of which are dependent on it for their fundamental basis. 

 We have also seen that a study of the more general sciences 

 of Physics and Chemistry ought to precede the study of 

 Biology, j list as the discussion of the principles of Biology 

 forms a necessary preliminary to the proper understanding 

 of the phenomena and laws of Psychology, Sociology, and 

 other related sub-sciences. 



The first chapters of this text-book are, therefore, devoted 

 to giving a short account of the principles of Physics and 

 Chemistry, looked at mainly in the light of their application 

 to Biology ; whilst the chemical and physical characters of 

 protoplasm ' the physical basis of life ' led up to by a 

 brief discussion of chemical compounds in general, forms 

 the natural introduction to the subject-matter of Biology 

 itself. 



