The American home educator and book of universal knowledge : containing concise and exhaustive articles upon science, arts, and mechanics--automobiles, aerial transportation, cinematograph, liquid air, submarine navigation, pneumatic tubes, wireless telegraphy, war balloons, etc., etc., all the latest discoveries and inventions, ship building, petrified forests, gold products of the world, curious facts, wonders of electricity, history and travel, the X-ray, etc., etc., being a complete treasury of knowledge on scientific, historical, artistic, and all important subjects, the whole forming a superb library of the most valuable information, including the best selections from the writings of hundreds of men renowned in science, invention, and discovery, such as Edison, Marconi, Tripler, Mergenthaler, Tesla, Roentgen, Bell, Proctor, Morse, etc