Nov. 21, 1884.] 



♦ KNOWLEDGE ♦ 



425 



NIGHT SKY FOR NOVEMBER AND DECEMBER. 

 Second Map of Pair. 



November 22 at 10 o'clock. 

 November 26 at 9J o'clock. 

 November 30 at 9^ o'clock. 



Showing the heavens as they appear at the following hours : 



December 4 at 9J o'clock. 



December 7 at 9 o'clock. 



December 11 at 81 o'clock. 



December 15 at 8i o'clock. 

 December 19 at 8i o'clock. 

 December 23 at 8 o'clock. 



that the map has not, properly speaking, top, bottom, or 

 sides ; the centre represents the point overhead, the cir- 

 cumference marks the horizon. The stars of the first three 

 magnitudes only are shown, and the constellations are 

 numbered, not named. The numbering begins with the 

 Little Bear, to see which in its proper position the map 

 must, of course, be held with the " Northern Horizon " 

 downwards. The other constellations are taken as nearly 

 as possible in the order of their distance from the pole (a in 

 1 is the pole star), from Draco, the Dragon, which being 

 nearest the polar constellation is numbered 2, to Argo, the 

 Ship, which being the farthest from the pole of all those 



included in this serifs of maps is numbered 45, the last 

 number in our list. The constellations are also taken 

 around the pole in the order of their right ascension, — or 

 in the direction in which the hands of a watch move, 

 around the north pole, which in the southern skies means 

 from right to left. 



The constellations included in the set of maps are 

 numbered throughout as follows : — 



1. Ursa Minor, the Little Bear 



(a, the Pole Star). 



2. DracOjtheZhogon (ajThuhan) 



3. Cepheiis, King Cepheus. 



4. Cassiopeia, the Lady in the 



Chair. 



5. Persens, the Champion (/?, 

 Algol, famous variable). 



[This List is continued on the next page. 



