Stránka:roll 1917.djvu/351

Things to Enow and Do 319 The rarest eyeisight, under the best conditions, see up to ten; and, according to Flammarion, the record with unaided eyes is thirteeen. VEGA, OF THE LYRE If one draw a line from through the back wall of the Dipper, that is, from the back bottom star, through the one next the handle, and continue it upward for twice the total length of the Dipper, it will reach Vega, the brightest star in the nordiern part of the sky, and believed to have been at one time the Pole-star — and likely to be again. Vega, with the two stars near it, form a small triangle. The one on the side next the North Star is called Epsilon. If you have remarkably good eyes, you will see that it is a double star. THE NEBULA IN ORION'S SWORD Just about the middle of Orion's Sword is a fuzzy light spot. This might do for blood, only it is the wrong color. It is the nebula of Orion. If you can see it with the naked eye, you are to be congratulated. ON THE MOON When the moon is full, there is a large, dark, oval spot on it to the left, as you face it, and close to the east rim, almost half- way up; this is the Plain of Grimaldi; it is about twice the size of the whole State of New Jersey; but it is proof of a pair of ex- cellent eyes if you can see it at all. Books Recommended The Book of Stars, by R. F jCollins. D. Appleton & Co. Piice, $i .00 Around the Year Wuh the Stars, by Garrett P. Serviss. Harpers. Price, I1.00