578 COSMOS. 



Number of meteors 



Time. in one hour. Number of years. 



6th of August 6 .... 1 



7th .... 11 .... 3 



8th .... 15 .... 4 



9th .... 29 .... 8 



10th 31 6 



llth .... 19 5 



12th .... 7 3 



The last year gave for the hour, notwithstanding the clear 

 moonlight : 



On the 7th of August 3 Meteors 



8th 8 



9th 16 



10th , 18 



llth 3 



12th 1 Meteor. 



(According to Heis, there were observed on the 10th of 

 August : 



1839 in one hour 160 Meteors 



1841 .. ..43 



1841 .. .. 50 



In the August meteor-stream in 1842, there fell at the time 

 of the maximum, in ten minutes, 34 shooting stars). All 

 these numbers refer to the circle of vision of one observer. 

 Since the year 1838, the November falls have been less 

 brilliant. (On the 12th of November, 1839, Heis still counted 

 hourly 22 to 35 meteors; likewise on the 13th of Novem- 

 ber, 1846; upon the average 27 to 33.) So variable is the 

 abundance of the periodic streams in individual years ; but 

 tlie number of the falling meteors always remains considerably 

 greater than in ordinary nights ; which show in one hour only 



