232 SPECIAL RESULTS IN THE ITRANOLOGICAL 



combine them into six groups each of four hours, we 

 obtain : 



Hours. Hours. 



E. A. to 4 . . . 311 



4 8 . ' . ' '.V; . 179 



8 12 , . . , . . 606 



12 16 ' .. . , , . 850 



16 20 . . . ' , . 121 



20 24. . . ... . 239 



By a more careful separation according to North and South 

 Decimation, we find that in the six hours of Eight Ascension 

 from nine hours to fifteen hours, there are in the northern 

 hemisphere alone, 1111 nebulae and clusters of stars,( 400 ) 

 viz. : 



Hours. Hours. 



From 9 to 10 . . . . . 90 



10 11 . . . / . 150 



11 ]2 . . . . i f 251 



12 13 . ' . . . . 309 



13 14 . . . . ; . 181 



14 15 . . J * . V 130 



The true northern maximum of nebulse is therefore situated 

 between 12h. and 13h., very near the North Galactic Pole. 

 Farther on, between 1 5h. and 16h., towards the constellation 

 of Hercules, the decrease is so sudden that the number falls 

 from 130 to 40. 



In the southern hemisphere we find not only a much 

 smaller number, but also, generally speaking, a much more 

 uniform distribution of nebula. Spaces devoid of these 

 celestial phenomena alternate with sporadic nebulae; with 



