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Updated: June 24, 2025
Are these wells fed by water from the river percolating through the sand, or by ground water on its way to the stream and possibly contaminated with the sewage of the town? At what height does underground water stand in the wells of your region? Does it vary with the season? Have you ever known wells to go dry?
Now the home stretch lay before him, some twenty miles through a wonderful broken country, all spruce and pine forests, crag and valley, threaded by a white hard trail which wound its way amidst Nature's chaos in a manner similar to that in which a mountain stream cuts its course, percolating along the path of the least resistance.
With his throat throbbing to the impulse of new-born hope he emerged completely from behind the refuge of the storm doors, backed himself out and down upon the top step, and by means of a dubious illumination percolating through the fanlight above the inner door he made out the figures upon the lintel.
Flag Hill is a rock formed of sand and comminuted shells; while the flat which stretches to the south-west from its foot is of limestone formation. In it we found a kind of cavern, about 15 feet deep, with a sloping entrance, in which was some slightly brackish water, that in percolating through the roof had formed a number of stalactites.
The dams, too, were drilled by water-rats, and the streams percolating through, slowly increased the size of these tunnels till the structure burst, and the current swept on and added to the floods below. Mill-dams stood longer, but, as the ponds silted up, the current flowed round and even through the mill-houses, which, going by degrees to ruin, were in some cases undermined till they fell.
Should I calculate the lands to be mowed one at a time in even swaths? The mower being 5-foot cut, would you count on cutting a 4 1/2 or 5-foot swath? This soil is sandy, water percolating rapidly. The fall is 8 feet to the mile. How wide, then, would you advise making the ridges to suit the mower, and to flood economically, using from 2 to 4 cubic feet per second?
From this we may fairly reason that at these points the slow stream filling the lode cavity met with a reagent percolating from this particular band of rock, which caused the deposition of its metals; and, indeed, I am strongly disposed to believe that the deposition of metals, particularly in some loose lodes, may even now be proceeding.
By midnight the gale had moderated to a strong breeze, and the sky had cleared sufficiently to permit of a little moonlight percolating through between the denser clouds, and we were then able to make out to our inexpressible chagrin that the barque's people had already got their new topmast aloft and ridded, and were getting their main-topsail-yard across, having been hard at work, doubtless, ever since darkness set in, though how they had managed to perform their task was a puzzle to us.
Springs issue, however, here and there, in several places, from the ground, and, percolating through the sands along the valley, give fertility to little dells, long and narrow, which, by the contrast that they form with the surrounding desolation, seem to the traveler to possess the verdure and beauty of Paradise.
It was sixty or seventy yards wide, and waist-deep. Like all these sand-rivers, it is for the most part dry; but by digging down a few feet, water is to be found, which is percolating along the bed on a stratum of clay. This is the phenomenon which is dignified by the name of "a river flowing under ground."
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