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 contrary to reason and natural law, but they must be informed that on Mars there are chemical elements and affinities not known in our world. It requires but little change in the elementary construction of the atmosphere to render it capable of strong heat-retaining properties.

Standing on the surface of this planet, my attention was easily attracted by the two frisky moons called Deimos and Phobos, at the small distance of 14,600 and 12,500 miles respectively. These two moons are constantly flying around the planet, one in about thirty hours and the other in seven and one-half hours.

The astronomers of Mars have discovered unmistakable signs of human life on the farthest of these two moons. They are hoping to be able some day to cover the intervening distance and for the first time see their old neighbors face to face.

Before I had traveled over one-half the surface of this planet I was thoroughly convinced that it was a rough, jagged world without lofty mountain ranges or peaks. The many long and narrow fertile valleys, much