THE LAWS OF SCIENCE 57 



from other sciences in that they confine themselves 

 to laws of this type and (in so far as they are completely 

 " classificatory ") do not base on them other laws of 

 other kinds. 



To the student who, after reading this little book, 

 proceeds to the detailed study of one or more actual 

 sciences, the interesting problem is proposed of dis- 

 tinguishing between the different kinds of laws that are 

 characteristic of them ; for every science has its own 

 peculiarities in the features of its law. But we cannot 

 spend space on this inquiry ; we must now face a 

 different and more pressing problem. 



