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Cutting trees when they have reached their maximum is a most necessary part, and it's a policy that helps to make the forest pay for itself. But the value to the forest lies in its conservation. You know about that?" "Yes, sir," said the boy; "it's keeping the watersheds from becoming deforested, either by cutting or by fire, and so preventing erosion from taking place."
Its feeders reach the Andes, draining watersheds within a hundred miles of the Pacific ocean. It has tributaries fifteen hundred miles long. It did not take the Black Bear very long to pass the green islands near the delta. The river there looks like an ocean. In fact, the main branch of the Amazon is from fifty miles to two hundred miles in width. Some of the tributaries are a hundred miles wide.
But the men of the sources, up toward the "swamps of the nests of the eagles," on the low watersheds, heard only vague reports of the sea or gulf; even the Indians of Arkansas, as we read in the account of the De Soto expedition, could or would "give no account of the sea, and had no word in their language, or idea or emblem, that could make them comprehend a great expanse of salt water like the ocean."
He must have crossed the rising ground separating two watersheds that sloping towards his own lake and towards some other.
Why, there's nothing we couldn't grind or saw or illuminate or heat with a set of turbines! That's to say if all the Five Watersheds are agreeable." "Oh, we've been agreeable for ever so long." "Then why didn't you tell me?" "Don't know. Suppose it slipped our memory." The Waters were holding themselves in for fear of bursting with mirth. "How careless of you!
We should also remember that the crests or watersheds of the Alps and Jura are about 80 miles apart, and if once we suppose them to have been in movement during the glacial period it is very probable that the movements at such a distance may not have been strictly uniform.
The ground was getting stonier, and bare patches of rock were constantly passed; surely they must be getting on higher country; they were doubtless ascending the gradual rise of one of the inland watersheds, and suddenly they hoped the ground would break away at their feet in deep gullies and ravines; below they would see the tops of green trees, shading some quiet waterhole.
Or the Romans knew how to cause the parted floods to measure their plain with the strong, steady, and level flight of arches from the watersheds in the hills to the and city; and having the waters captive, they knew how to compel them to take part, by fountains, in this Roman triumph. They had the wit to boast thus of their brilliant prisoner.
So sharply is the line drawn in some places, that on the dividing watersheds of the east coast flocks of galar parrots and plain-pigeons will be found feeding on the western slope of a ridge, but never by any chance crossing on to the eastern. Australia is rich in waders, and they are found all over the continent.
It runs along the Rother to its bifurcation, and then makes for the heaven-water-parting or dividing back of the Forest Ridge, beside two or three lesser streams. Then it passes along the crest of the ridge from Tunbridge Wells, past East Grinstead and Crawley, till it strikes the Hampshire border. There it follows the line between the two watersheds to the sea, which it reaches at Emsworth.
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