THOUGHTS 



ON 



OUR CONCEPTIONS 



OF 



PHYSICAL LAW 



'.I 



BY ii /j 



PROF. FRANCIS^^Ev OTRt^]^R. ^^' fy, 



''<'vr. 



An address hkfork thf, Ai.rMNi ok i'iik State University of Iowa, June 19, j 

 1878; Di'.i.ixERicD A 1' Kansas C'liv, Decemijer 23. 1878. 



PRINTED AT THE OFFICE OF THE KANSAS CITY REVIEW. 



