All nature is one, but for convenience of classification we have divided our knowledge into a number of sciences which we usually regard as quite distinct from each other.


Annual Report of the Board of Regents of the Smithsonian Institution, 1896, On the Magnitude of the Solar System (p. 93), Government Printing Office. Washington, D.C. 1896

William Harkness Quotes

All nature is one, but for convenience of classification we have divided our knowledge into a number of sciences which we usually regard as quite...

All nature is one, but for convenience of classification we have divided our knowledge into a number of sciences which we usually regard as quite...

All nature is one, but for convenience of classification we have divided our knowledge into a number of sciences which we usually regard as quite...

All nature is one, but for convenience of classification we have divided our knowledge into a number of sciences which we usually regard as quite...