CHAPTER X 

 SCIENCE 



THE beginner who has attentively read the preceding 

 chapters of this little work will have been introduced to 

 the elements of the physical sciences and also to those of 

 psychology * and of logic. 



We saw at the outset t that there is one property 

 common to all those things we have successively passed 

 in review namely, the property of number. But there 

 is another quality which is also common to every well- 

 founded perception we have gained, whatever has been 

 the nature of the objects considered. That quality, or 

 property, is truth. J 



It is a matter of course that no scientific conclusion, 

 or doctrine, can be worth anything if it is not " true," 

 as also that every scientific inquiry is necessarily an 

 inquiry after " truth " after truths of one kind or 

 another. 



Now the tests of truth are different in different lines 

 of investigation. In mechanics and the study of physical 

 forces we may often avail ourselves largely of experi- 

 ment, as also in the study of the living world. In 

 Palceontology, however, we can but make use of 



See ante, pp. 252 and 268. t See ante, p. 5. 



See ante, p. 260. See ante, p. 244. 



