Democratic Sentinel, Volume 21, Number 47, Rensselaer, Jasper County, 19 November 1897 — POPULAR SCIENCE. [ARTICLE]

POPULAR SCIENCE.

There is no water on the moon’s surface. Our sun Is but one of thousands of others of equal or greater magnitude. The light of the moon Is only about one-six hundred thousandth that of the euu. Wind power Is derived from the unequal beating 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. The greatest depth, writes Prof. Seeley In his “Story of the Earth,’’ at which earthquakes are known to originate is about thirty miles. It has also been calculated that a heat sufficient to melt granite might occur at about the same depth. A Hamburg young man has just had his sanity proved by the Roentgen raya. He declared ten years ago that he had a bullet in his head, which he had fired iuto it in trying to commit suicide. He complained of the pain, and, as ha attacked his keepers, and the doctors could find no trace of a wound, waa locked up as a dangerous lunatic. The Roentgen rays have now shown the exact pluee of the bullet. A novel disposition of sewage is made at Exeter, England, 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 axe rapidly set up; the microbes multiply and the solid portions of the sewage are consumed and the outflow from the tames through filters loses all color and taste, No chemical is used and no at* tentlon to tin* tanks of any sort is needed. Each filter bed automatically cleanses Itself by bviui tat of vaster a »uot time. v ,