106 INDUCTION. 



upon the real properties of the phenomenon, than the 

 following out such an hypothesis. But to this end it 

 is by no means necessary that the hypothesis be mis- 

 taken for a scientific truth. On the contrary, that 

 illusion is in this respect, as in every other, an impe- 

 diment to the progress of real knowledge, by leading 

 men to restrict themselves arbitrarily to the particular 

 hypothesis which is most accredited at the time, 

 instead of looking out for every class of phenomena 

 between the laws of which and those of the given 

 phenomenon any analogy exists, and trying all such 

 experiments as may tend to the discovery of ulterior 

 analogies pointing in the same direction. 



