December 1, 1886.] 



• KNO^A^LEDGE ♦ 



present the exact scene indicated in Map II., at the times 

 mentioned underneath it. In anv latitude between 3(1^ and 

 46° south the map will serve very nell for the identification of 

 the principal star groups. As an illustration of this range 

 in the latitudes over which such maps can be used, I may 



instead of this wide range of 28^ I would suggest only a 

 range of about 16° — viz., from 30^ to i6^ (north or south 

 respectively). And, of course, the nearer the latitude of a 

 place is to 3S= the more correct the present series of maps 

 will be found. 



The Night Skies in the Southeun He.mispheke (Lat. 46" to 24° S.) and the Sovtuern Skies in England 



(Upper Half of Map only) :— 



1 o'clock morn, Dec. 7 

 12.30 o'clock, Dec. 1.5 

 Midnight, Dec. 23 



11.30 ni?ht, Dec. 30 



11 o'clock, Jan. 7 

 10.30 „ Jan. 14 

 10 „ Jan. 22 

 9.30 „ Jan. 29 



9 o' lock, Feb. 6 



8.30 „ Feb. 14 



8 „ Feb. 21 



7.30 „ Mav 1 



mention that the maps of my " Star Primer," constructed 

 specially for the altitude of the middle of England, have 

 been used in America as far south as latitude 38^. Maps 

 constructed for latitude 38° north or south, might with 

 equal projjriety be used for latitude 52° (north or south 

 respectively), or for latitude 21° (north or south) ; but 



USE OF MAP ir. IX SOUTHERX LiTITUDES. 

 When using the map in the latitudes for which it is 

 specially intended the student is to remember that the rim 

 of the map represents the horizon, while the centre marks 

 the point overhead. Thus, to determine what constellations 

 lie towards any point of the horizon, the student is to bring 



