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Show Rivers Fight for Existence. Tho discovery that there Is n kind of struggle for existence nnd survival of the fittest among rivers Is ono of the most Interesting reaultH of tho modi n study of physiography. A no-taVi no-taVi cxamplo of this contest 'b ex-hit'' ex-hit'' ed by England's two biggest rivers, riv-ers, tho Thames and tho Sovorn. Between Be-tween their valleyB lie tho Cotswold Hills, and exploration shows that tho Severn, by eating backward among these hills, whero softer strata under. Ilo them, has diverted to Itself some of the headwaters which formerly flowed into tho Thames. Harper's Weekly. o |