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Show i "Chameleon Lakes" i It is well knon that the water of ' many lakes exhibits cha racterisi n ; colors. Lake Geneva, at the western 1 end of Switzerland, is blue, while 1 Lake Constance, at the eastern end 1 of that country. Is green. Bluenoss implies purhy, since the natural cul.ir . of water Is blue. A green lake has Its water slightly clouded with ii'ipur- i t i es. It is said that green lakes some- j times become absolutely colorless for ! a time, and It has been found that this sudden change of line is due to : the washing Into tbe lakes of mud ' colored red by oxide of iron. Ked Is 1 complementary to green, and the re- ! sull of the mixture is that the green color of the water becomes (iu the ' time beinu- neutralized. |