SCIENCE AND PHILOSOPHY 125 



very gratefully acknowledge, states the differ- 

 ence between Science and Philosophy as follows: 

 "The work of the Philosophy of Nature and of 

 Mind only begins where that of the experimental 

 sciences leaves off. Its data are not particular 

 facts, as directly amassed by experiment and 

 observation, but the hypotheses used by experi- 

 mental science for the co-ordination and de- 

 scription of those facts. And it examines these 

 hypotheses, not with the object of modifying their 

 structure so as to include new facts, or to include 

 the old facts in a simpler form, but purely for the 

 purpose of estimating their value as an account of 

 ultimately real existence. Whether the hypoth- 

 eses are adequate as implements for the calcu- 

 lation of natural processes is a question which 

 Philosophy, when it understands its place, leaves 

 entirely to the special sciences; whether they can 

 claim to be more than useful formulae for calcu- 

 lation, i. e. whether they give us knowledge of 

 ultimate Reality, is a problem which can only be 

 dealt with by the science which systematically 

 analyses the meaning of ^reality, i. e. by Meta- 

 physics. We may perhaps follow the usage" of 

 some recent writers in marking this difference of 

 object by a difference in terminology, and say 

 that the goal of experimental science is the De- 

 scription of facts, the goal of Metaphysics their 

 Interpretation. The difference of aim is, how- 



