Page:Peter Alexeivitch Kropotkin - Modern Science and Anarchism (1912).pdf/21

 physical facts which we see produced when two billiard balls meet, or when a stone falls; or to the chemical facts which we see going on around us. These mechanical facts have been sufficient till now to explain all the phenomena we have studied. They have never yet played us false, and we do not see the possibility of ever discovering a sphere in which mechanical facts would not meet our want. Nothing up till now justifies us in surmising the existence of such a domain.