388 
REPORT— 1854* 
the evening of the 9th one of my assistants, M. Bouvy, counted by himself 57 
meteors between half-past nine and midnight, divided as follows:— 
From 9.}- to 10, 6 falling stars. 
From 10 to 11, 23 ditto. 
From 11 to 12, 28 ditto. 
The state of the sky was very favourable, excepting during the first half-hour, 
the moon being then still above the horizon ; from 10 o’clock until midnight 
one single observer obtained on an average 25*5 falling stars an hour. 
On the evening of the 10tb a larger number of persons joined in the ob¬ 
servations: two Egyptian Astronomers, M.M. Mahmoud and Ismail, joined 
me and my two assistants, MM. Bouvy and Gregoire ; the latter was alum-'- 
exclusively occupied in transcribing the observations. Many falling star- 
were seen at once by several amongst us, because that part of thebf<wn> 
which is visible from the Observatory terrace, only includes two-thirds u 
the sky ; the N.W. and N.E. regions arc hidden by buildings, and one part 
of the E. by trees; so that two observers would fully suffice to noteal * 
appearances. They occurred thus:— 
From 9} to 10, .34 falling stars. 
From 10 to 11, 77 ditto. 
From 11 to 11}, 18 ditto. 
From 11} to 12, 34 ditto. *ninnVlock 
The sky continued perfectly clear the whole evening: but until 
the presence of the moon would necessarily diminish the nunl “ e . r <■ rfi 
meteors. From 11} to 12 o’clock, there was but. one observer; wwr ■ 
by doubling the number (34) counted by him, and only indwiug »c° 
vations made after the setting of the moon, we obtain a mean ol wh>" 
an hour for two or more observers. _ , ,,, crcas s 
Just as in preceding years, it seems that the number of meteoi 
progressively from the IOth August, thus- . nnlinW jli 
Ihe 6th, from 9’1 5 to 11*45, with a clear sky, M. Gregoire 
meteors, making 10 an hour, rather more than the ordinary averag ^ 
Ihe 8th, from 9 to 12 o’clock, M. Dutilleul counted 39, although*^ ^ 
was generally cloudy, particularly from 9 to 10 o’clock: he ob.tr 
average about one-third of the sky ; being 13 meteors an hour. 
The 9th, as seen above, produced 25‘5 an hour ; whilst on 
singe observer would have been able to count about 41. w itha clr* r 
lc M. Dutilleul, observing alone from 9 o’clock till 1-.- 
- ‘ enable 
did not 
1 ..VUI, VJU^CIVIllg tllOIJU liuuitf " 
a’’i J et ? ountcd 55 meteors, making 18‘3 an hour, 
ihe observations made on the 12th, from 9f to lOh u,u 
in. bouvy to count more than 13 in an hour, with a clear sky; 8 ^ 
after (13th), the number observed by M. Gregoire was uudei , 
nary average. 3 b0 It 
thir n* K we f^oup the falling stars according to their brightness, 
the following numbers 
Aug. 9. 
Aug. 10. 
15 
52 
of the 1st mag. and larger. 
16 
24 
of the 2nd. 
10 
33 
of the 3rd. 
8 
13 
18 
16 
of the 5th and smaller. 
25 
undetermined. 
