to the linear inch. In addition to the visible radiations, the atoms emit the much shorter waves corresponding to X-rays and also longer ones called heat waves. Electric waves are of similar nature, but are caused by the oscillations of electric charges in bodies larger than atoms. All these waves travel with the same velocity, 186,300 miles per second. The unit employed in measuring light-waves is the angstrom, whose length is one ten-millionth of a millimeter (0.000,000,004 inch). The instruments and methods are so accurate that results correct to less than a hundredth of an angstrom are obtained. "The hydrogen atom is probably composed of a very small positively charged nucleus around which an electron circulates at a relatively great distance. The diameter of this orbit, or the diameter of the atom, is less than one hundred-millionth of an inch-1/100,000,000 inch. The diameter of the nucleus is of the order of one-two-thousand-billionth of an inch-1/2.000,000,000,000 inch. The diameter of the electron is about one five-thousand-billionth of an inch-1/5.000,000,000,000 inch. In a cubic inch of air there are about 43 billion billion molecules43,000,000,000,000,000,000."-ASTRONOMICAL SOCIETY OF THE PACIFIC. As we change the form of substances by the application of the laws of chemistry and note the phenomena of these transformations we marvel at the wonderful energy manifested. We see that the substance changes only in form: but not a particle is destroyed. This fact brings to our notice the wonderful economy of nature, or the law of the conservation of energy. The energy stored up in our coal fields and oil deposits is constantly being transmitted into life's activities through manufacturing and industrial lines, evolving and changing mat ter without dissipation into every conceivable form in life's contacts. When we observe the wonderful gifts showered upon humanity by these laws and consider the benign purpose back of them, we can better appreciate the spirit of the Psalmist when he exclaims, "Oh, that men would praise the Lord for his goodness and his wonderful works to the children of men." TOPICAL SUGGESTIONS: 1. Our great Creator having prepared the earth and the seed with rains and heat now supplies the tools through laws of Chemistry. 2. Application of Chemistry to various rocks and ores extract the metals needful for tools and machinery, planting, cultivation and harvesting. Railroads, telegraph and telephone systems, vehicles for commercial use. 3. The film, products of art, the paints we use, clothes we wear, and food products, all pay obeisance to the laws of chemistry. 4. These laws in surgery. Preservation of foods. 5. The marbles, coals, oils and mines and wells, their wondrous history. 6. Fertilization, adding wealth to the nations through chemistry. 7. The newspaper, phonograph record, telescope, microscope, and photography-The wheels of commerce. 8. Discoveries of X-Rays, radium, movements of molecules, atoms and electrons. A V THE PALACE WE LIVE IN (THE FIVE SENSES) MONG the many marvelous creations marking the goodness of God we must consider the human body or movable house with which we are so intimately associated. It may be called the acme of His creative genius. Within this palace we find all the passions, joys, loves, aspirations and hopes of life mingled with all the appeals of His abounding creations, now to the finer and nobler impulses, then to the more sordid and lower instincts, all surging as it were as the waves of the sea, but finally calming down to the quiet equilibrium of peace. Man is made more noble for the storms through which he passes and better prepared for the higher and larger duties of life. The buffeting may leave marks as the scars of the sculptor's chisel, but each blow brings out more clearly the finer fiber and perfect form. This Palace is featured by movable foundations with self-sustaining automatic appliances for building, while at the same time it tears down the waste of life and with censors so keenly and finely adjusted that only the mind of creative genius would dare to proclaim it "mine." When we look at the fine adaptations, the powers of assimilation, the gathering up of the particles making for health and happiness, and clearly discriminating them from the waste and refuse of the Palace, we marvel. Then when we further discern the keenness of instinct |