This teaches you the constellations first and the brightest stars incidentally. Also it gives the old myths. 3. _Serviss._ _Astronomy with an Opera-Glass._ D. Appleton & Co., New York, 1906. 4. _Serviss._ _Pleasures of the Telescope._ D. Appleton & Co., New York, 1905. 5. _Milham._ _How to Identify the Stars._ The Macmillan Co., New York, 1909. This gives a list of eighty-eight constellations, including thirty-six southern ones, and has tracings of twenty-eight. 6. _Elson._ _Star Gazer's Handbook._ Sturgis & Walton Co., New York, 1909. About the briefest and cheapest. Has good charts and makes a specialty of the myths. 7. _Serviss._ _Curiosities of the Sky._ Harper & Brothers, New York. Tells about comets, asteroids, shooting stars, life on Mars, nebulæ, temporary stars, coal-sacks, Milky Way, and other wonders. 8. _Ball._ _Starland._ Ginn & Co., Boston, New York, etc., 1899. This tells about a great many interesting experiments in astronomy that children can make. * * * * * If I had only a dollar or less to spend on astronomy I should buy a planisphere. I got mine from Thomas Whittaker, No. 2 Bible House, New York. It cost seventy-five cents, and will tell you where to find any star at any time in the year. It does not show the planets, however. A planisphere that will show the planets costs about five dollars. However, there are only two very showy planets, viz., Venus and Jupiter. Any almanac will tell you (for nothing) when each of these is morning star, and when each of them is evening star. The best newspaper about stars, as far as I know, is a magazine called _The Monthly Evening Sky Map_, published by Leon Barritt, 150 Nassau St., New York. It costs a dollar a year. It gives a chart every month, showing all the planets, and all the constellations. Also it tells you about the interesting things, like comets, before they come. Good-bye. I hope you will never cease to learn about and love the earth and the sky. Perhaps you think you have learned a great deal already. But your pleasures have only begun. Wait till you learn about how the world began, the sun and all his planets, the distances between the stars, and the millions of blazing suns amid the Milky Way! THE END [Illustration: THE SKY IN WINTER] NOTE.--These simplified star maps are not as accurate as a planisphere, but they may be easier for children. All star maps are like ordinary maps, except that east and west are transposed. The reason for this is that you can hold a star map over your head, with the pole star toward the north, and the map will then match the sky. These maps contain some constellations that are only for grown-ups to study. The Winter constellations every child should know are: