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Show "Chameteon Laket" It Is well kno'vn that the water of many lakes exhibits characteristic colors. Lake Geneva, at the western end of Switzerland, Is blue, while Lake Constance, at the eastern end of that country. Is green. Bluenes implies purity, since the natural color of water Is blue. A green lake has Its water slightly clouded with Impurities. Impur-ities. It is snld that green lakes .sometimes .some-times become absolutely colorless for a time, and It has been found that this sudden change of hue Is due to the washing into the lakes of mud colored red by oxide of Iron, lied is complementary to green, anil the result re-sult of the mixture Is ih11 the green color of the water becomes fur the time being neutralized. |