The universe. Man-made skies. The eart. Air in motion. Problems of cloudland. Transformations of water vapor. Life. Basic units of life. Living ligth. Living electric batteries. Plant life. The soil. The fertility of the soil. Earth´s invisible army. Plants as storehouses. Animal life. Animal intelligence on display. The protozoans. Sponges, jellyfish and sea stars. The worms. The mollusks. The crustaceans. Spiders and their kin. The mighty insect. Man. The covering of the body. Health. Heating and ventilation. The water supply. Mathematics. An introduction to algebra. Matter and energy. Forces within liquids and gases. How things move. Chemical ractions. Fiber optics. the force of gravitation. Industry. Treasures of the quarry. The forest industries.Transportation. Tunneling the earth. The automobile. The story of bridges. Communication. Communication satellites. Telegraph and telephone. Science through the eges. The middle ages (450 - 1450) Renaissance (1450 - 1600). Projects and experiments. Shell collecting. Experiments wth air. The amateur fossil hunter.