Popular Science

Therp is no water on the moon's surface. Our sun is but one of thousandjs of others of equal or greater magnitude. The light of the moon is only about one six-hundred-thousandth that of the sun. Wind power is derived fron the uaequal heatlng of various portions of the earth by the sun's rays. Astronomers say that there is every reason to believe that human life on Mars is much like it is on this earth. Placed deeper it dies. Coral found below forty fathoms indicatea either that the bottom has gone down or it has fallen from the forty-fathom depth. The greatest depth, writes Prof. lsy in hls "Story of the Earth," at which earthquakes are known to origínate is about thirty miles. It has also been calculated that a heat sufflcient to melt granite might occur at about the same depth. A Hamburg young man has just had hie saníty proved by the Roentgen rays. He declared ten years ago that he had a bullet in his head, which he had fired into it in trying to commit suïcide. He complained of the pair., and, as he attacked his keepers, and the doctors could flnd no trace of a wound, was locked up as a dangerous lunatic. The Roentgen rays have now shown the exact place of the bullet. A novel disposition of sewage is made at Exeter, Engjand, according to London Machinery. The method consists of four tanks, a fourth of the sewage passing into each. Light and air are excluded from the tanks; putrefaction and decomposition are rapidly set up; the microbes multiply and the solid portions of the sewage are consumed and the outflow from the tanks is nothing through filters lases all color and taste. No chemical is used and no attention to the tanks of any sort is needed. Each filter bed automatically cleanses itself by being out of use for a short time.