wakens the imagination, conveys useful knowledge, and opens the doors towards wisdom. Its special aim is to stimulate observation and to excite a living and lasting interest in the world that lies about us. The sciences of astronomy, physics, chemistry, meteorology, and physiography are treated as fully and as deeply as the conditions permit; and the lessons that they teach are enforced by examples taken from familiar and important things. Dozens of illustrations depict the features described in the text. Suitable for ages 11 and up.