forest depths. A drop falling from a pas- 

 sing shower into the lake of Delolo may be 

 carried eastward, through the Zambesi, to 

 the Indian Ocean, or westward, along the 

 transcontinental course of the Congo, to 

 the Atlantic. The mists that rise from 

 great streams, separated by vast stretches 

 of territory, commingle in the upper air, 

 and are carried by vagrant winds to the 

 wheat-fields of the far Northwest or the 

 rice-fields of the South. The ocean cease- 

 lessly makes the circuit of the globe, and 

 summons its tributaries along all shores to 

 itself. But it gives even more lavishly than 

 it receives ; day and night there rise over 

 its vast expanse those invisible clouds of 

 moisture which diffuse themselves through 

 the atmosphere, and descend at last upon 

 the earth to pour, sooner or later, into the 

 rivers, and be returned whence they came. 

 This subtle commerce, universal throughout 

 the whole domain of nature, animate and 

 inanimate, tells us a common truth with 

 the rose, and corrects the false report of 

 the senses that all things are fixed and 

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