84 THE DOCTRINE OF ENERGY 



being a purely scientific doctrine, it does not come 

 within his sphere. Science, we are told, deals 

 with the phenomenal world internally considered ; 

 Philosophy with the relations of the phenomenal 

 world to Reality, and with the nature of the trans- 

 cendental elements in our Knowledge. 



This may be generally true. Nevertheless, 

 Philosophy and Science have surely concepts in 

 common. They both refer to the same thing when 

 they speak of Space ; we presume also when they 

 speak of Matter. Indeed, Philosophy analyses 

 the conceptions involved not only in scientific 

 reasoning, but in the most common and ordinary 

 mental processes. It analyses them with special 

 reference to the relations between the Phenomenal 

 and the Real a question which, though it always 

 lies latent, does not in ordinary circumstances 

 arise in urgent form. It is therefore evident that 

 the fundamental conceptions of Science do fall 

 within the purview of Philosophy. 



The study of Physics can be carried on practically 

 as a study of phenomena of Heat, Colours, Sounds, 

 Forces, etc., all of which are kinds of phenomena 

 without the expression of any dogmatic and formu- 

 / lated opinion as to their relation with Reality. 

 Physics can speak of mass and weight and avoid 

 all reference to Matter ; but there always is, in 



