here crop yields, and that this supply is constantly main- sea rising 1,960 feet higher. A few summits, a few tained through natural agencies in the soils dissolving are so many cable railways, which, for a relatively ridges, that of the Rigi-Kulm among them, alone the material of the soil grains.… … by agricultural chemists. tations of nature. For The fertility of the soil is several miles round about A SEA OF CLOUDS. there are unveil- thus shown to be ed, in a harmoni- due to physical causes which con- ous whole, villages hanging on to the trol the supply of rocks, hills cov- water and plant…
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