28o 



THE GUIDE TO NATURE. 



line of an irregular letter W. North- 

 west of Cassiopeia is the king, Cepheus, 

 whose constellation is rather incon- 

 spicuous. In our chart five of its prin- 

 cipal stars are shown. Perseus appears 

 east of Andromeda and Cassiopeia in the 

 midst of the Milky Way. His stars form 

 a bending bow. with a bright star in the 

 center. Below Perseus hangs the little 

 group called Medusa's Head, containing 



its mysterious dark comrade is consider- 

 ably more than three-quarters of a mil- 

 lion miles in diameter. They are only 

 about three ant! a quarter million miles 

 apart, measured from center to center. 

 There will be an eclipse of Algol about 

 half after 8 o'clock P. M. on Nov. 15th. 

 The star Gamma, Andromeda, alreadv 

 mentioned, is a very beautiful double 

 1 triple with very powerful telescope). 



Evening SkyMap for November 



Nov., Moon Phases 

 First Qtr.No 

 Full Moon, Nov 8 

 LastQ.tr. Nov 15 

 New Moon. Nov 23 

 FirstQtr.Nov 30. 



Garre tT (WT 



FACE50UTHAND 

 HOLD THE MAP OVER 

 YOUR HEAD -THE TOP 

 NORTH. AND YOU WILL SEE 

 YHESTARSANDPLANETS 

 JUST AS THEY APPEAR 

 INTHE HEAVENS 



The Arrow Through 



THE TWO STARS IN THE 



OWL OF THE BIG DIPPER 



POINTS TO THE NORTH STAR. 



THE STAR AT THE END OF THE 



HANDLE OFTHE LITTLE DIPPER 



SOUTH 



the wonderful variable Algol, which 

 runs through an astonishing series of 

 changes in brightness in a regularly 

 recurring period of two days, twenty 

 hours and forty-nine minutes. These 

 changes are believed to be due to par- 

 tial eclipses produced by a huge dark- 

 body working around Algol at close quar- 

 ters. Algol.it has been calculated, con- 

 siderably exceeds the sun in size, having 

 a diameter of about a million miles, wlule 



South of Gamma is seen the little con- 

 stellation of Aries, the leader of the 

 Zodiacal twelve, and south of that again 

 is the constellation Pisces, the no less 

 wonderful variable Mira. This differs 

 entirely from Algol in its variability, its 

 period of change occupying about eleven 

 months. When brightest it is sometimes 

 brilliant, exceeding the second magni- 

 tude, while, when faintest, it is far be- 

 yond the range of the naked eye, sink- 



