A very necessary item for the camp is pure water. If this cannot be obtained from a nearby spring which has good, clear water, or from a clean stream, it is possible to filter it in the same way that the Indians did. They had a way of purifying water from a 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.

If there is a stream at hand large enough to swim in, it is well to remember that if you work your hands and kick your feet you can stay above water for some time, even with your clothes on. Do not make the mistake of going into the water too soon after eating, for cramps are apt to result, causing a serious accident. The Indians have a method of protecting themselves from cramps. Coming to a bathing pool, the Indian swimmer, before entering the water, vigorously rubs the pit of his stomach with the dry palm of his hand. This rubbing probably takes a minute; then he dashes cold water all over his stomach, and continues the rubbing for another minute; and after that he is ready for his plunge.