The Indians had a simple way of purifying water from a lake, pond or swamp by digging a hole about one foot across and down about six inches below the water level, a few feet from the pond.
After it was filled with water they baled it out quickly, repeating the baling process about three times.
After the third baling the hole would fill with filtered water.
This is the purification of water by sedimentation through naturally filtered water that is recycled through the dirt, that captures and filters the excess bacteria in the soil and makes the water drinkable.
Source: Thrilling Adventures Among the American Indians By Edward Sylvester Ellis
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